1231030423100 has 144 divisors (see below), whose sum is σ = 2984871143520. Its totient is φ = 437944320000.

The previous prime is 1231030423099. The next prime is 1231030423127. The reversal of 1231030423100 is 13240301321.

It is a super-2 number, since 2×1231030423100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12775100 + ... + 12871100.

It is an arithmetic number, because the mean of its divisors is an integer number (20728271830).

Almost surely, 2^{1231030423100} is an apocalyptic number.

1231030423100 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 1231030423100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1492435571760).

1231030423100 is an abundant number, since it is smaller than the sum of its proper divisors (1753840720420).

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

1231030423100 is a wasteful number, since it uses less digits than its factorization.

1231030423100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96448 (or 96441 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1231030423100 its reverse (13240301321), we get a palindrome (1244270724421).

The spelling of 1231030423100 in words is "one trillion, two hundred thirty-one billion, thirty million, four hundred twenty-three thousand, one hundred".