123012821516 has 12 divisors (see below), whose sum is σ = 231831856032. Its totient is φ = 56775148368.

The previous prime is 123012821507. The next prime is 123012821531. The reversal of 123012821516 is 615128210321.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1182815540 + ... + 1182815643.

It is an arithmetic number, because the mean of its divisors is an integer number (19319321336).

Almost surely, 2^123012821516 is an apocalyptic number.

It is an amenable number.

123012821516 is a deficient number, since it is larger than the sum of its proper divisors (108819034516).

123012821516 is a wasteful number, since it uses less digits than its factorization.

123012821516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2365631200 (or 2365631198 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The spelling of 123012821516 in words is "one hundred twenty-three billion, twelve million, eight hundred twenty-one thousand, five hundred sixteen".