1231052100 has 72 divisors (see below), whose sum is σ = 3576833568. Its totient is φ = 326899200.

The previous prime is 1231052089. The next prime is 1231052111. The reversal of 1231052100 is 12501321.

1231052100 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1231052089) and next prime (1231052111).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1231052100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63787 + ... + 80813.

It is an arithmetic number, because the mean of its divisors is an integer number (49678244).

Almost surely, 2^1231052100 is an apocalyptic number.

1231052100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231052100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1788416784).

1231052100 is an abundant number, since it is smaller than the sum of its proper divisors (2345781468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231052100 is a wasteful number, since it uses less digits than its factorization.

1231052100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17285 (or 17278 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1231052100 is about 35086.3520474842. The cubic root of 1231052100 is about 1071.7466740553.

Adding to 1231052100 its reverse (12501321), we get a palindrome (1243553421).

The spelling of 1231052100 in words is "one billion, two hundred thirty-one million, fifty-two thousand, one hundred".