123012131000 has 128 divisors (see below), whose sum is σ = 314223399360. Its totient is φ = 44702208000.

The previous prime is 123012130987. The next prime is 123012131041. The reversal of 123012131000 is 131210321.

It is a super-2 number, since 2×123012131000² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23504384 + ... + 23509616.

Almost surely, 2^123012131000 is an apocalyptic number.

123012131000 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 123012131000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157111699680).

123012131000 is an abundant number, since it is smaller than the sum of its proper divisors (191211268360).

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

123012131000 is a wasteful number, since it uses less digits than its factorization.

123012131000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7402 (or 7388 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 123012131000 its reverse (131210321), we get a palindrome (123143341321).

The spelling of 123012131000 in words is "one hundred twenty-three billion, twelve million, one hundred thirty-one thousand".