1012123031100 has 108 divisors (see below), whose sum is σ = 2934184736616. Its totient is φ = 269367592960.

The previous prime is 1012123031093. The next prime is 1012123031159. The reversal of 1012123031100 is 11303212101.

It is a happy number.

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 1012123031100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 445279564 + ... + 445281836.

Almost surely, 2^{1012123031100} is an apocalyptic number.

1012123031100 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 1012123031100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1467092368308).

1012123031100 is an abundant number, since it is smaller than the sum of its proper divisors (1922061705516).

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

1012123031100 is an equidigital number, since it uses as much as digits as its factorization.

1012123031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5216 (or 2936 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1012123031100 its reverse (11303212101), we get a palindrome (1023426243201).

The spelling of 1012123031100 in words is "one trillion, twelve billion, one hundred twenty-three million, thirty-one thousand, one hundred".