123311030212100 has 36 divisors (see below), whose sum is σ = 267847531400400. Its totient is φ = 49276007321760.

The previous prime is 123311030212037. The next prime is 123311030212213. The reversal of 123311030212100 is 1212030113321.

It is a happy number.

It is a super-2 number, since 2×123311030212100² (a number of 29 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 604957130 + ... + 605160929.

Almost surely, 2^{123311030212100} is an apocalyptic number.

123311030212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123311030212100 is an abundant number, since it is smaller than the sum of its proper divisors (144536501188300).

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

123311030212100 is a wasteful number, since it uses less digits than its factorization.

123311030212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210119092 (or 1210119085 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 123311030212100 its reverse (1212030113321), we get a palindrome (124523060325421).

The spelling of 123311030212100 in words is "one hundred twenty-three trillion, three hundred eleven billion, thirty million, two hundred twelve thousand, one hundred".