12300051981 has 48 divisors (see below), whose sum is σ = 19282919424. Its totient is φ = 6953306976.

The previous prime is 12300051961. The next prime is 12300052013. The reversal of 12300051981 is 18915000321.

It is a de Polignac number, because none of the positive numbers 2^k-12300051981 is a prime.

It is a super-2 number, since 2×12300051981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12300051961) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8643036 + ... + 8644458.

It is an arithmetic number, because the mean of its divisors is an integer number (401727488).

Almost surely, 2^12300051981 is an apocalyptic number.

It is an amenable number.

12300051981 is a deficient number, since it is larger than the sum of its proper divisors (6982867443).

12300051981 is a wasteful number, since it uses less digits than its factorization.

12300051981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030 (or 2023 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 12300051981 in words is "twelve billion, three hundred million, fifty-one thousand, nine hundred eighty-one".