123085028100 has 72 divisors (see below), whose sum is σ = 356493620448. Its totient is φ = 32788793600.

The previous prime is 123085028093. The next prime is 123085028111. The reversal of 123085028100 is 1820580321.

It is a super-2 number, since 2×123085028100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 80032 + ... + 502568.

It is an arithmetic number, because the mean of its divisors is an integer number (4951300284).

Almost surely, 2^123085028100 is an apocalyptic number.

123085028100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123085028100 is an abundant number, since it is smaller than the sum of its proper divisors (233408592348).

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

123085028100 is a wasteful number, since it uses less digits than its factorization.

123085028100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423525 (or 423518 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The spelling of 123085028100 in words is "one hundred twenty-three billion, eighty-five million, twenty-eight thousand, one hundred".