123100000002 has 288 divisors, whose sum is σ = 328665392640. Its totient is φ = 33156103680.

The previous prime is 123099999989. The next prime is 123100000031. The reversal of 123100000002 is 200000001321.

It is a happy number.

It is a super-2 number, since 2×123100000002² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a self number, because there is not a number n which added to its sum of digits gives 123100000002.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 221005108 + ... + 221005664.

It is an arithmetic number, because the mean of its divisors is an integer number (1141199280).

Almost surely, 2^123100000002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123100000002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164332696320).

123100000002 is an abundant number, since it is smaller than the sum of its proper divisors (205565392638).

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

123100000002 is a wasteful number, since it uses less digits than its factorization.

123100000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 123100000002 its reverse (200000001321), we get a palindrome (323100001323).

The spelling of 123100000002 in words is "one hundred twenty-three billion, one hundred million, two", and thus it is an aban number.