21150005112 has 48 divisors (see below), whose sum is σ = 58613394840. Its totient is φ = 6886047168.

The previous prime is 21150005111. The next prime is 21150005113.

21150005112 is a `hidden beast` number, since 2 + 1 + 150 + 0 + 0 + 511 + 2 = 666.

21150005112 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (21150005111) and next prime (21150005113).

It is a super-2 number, since 2×21150005112² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150005111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3412603 + ... + 3418794.

Almost surely, 2^21150005112 is an apocalyptic number.

It is an amenable number.

21150005112 is an abundant number, since it is smaller than the sum of its proper divisors (37463389728).

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

21150005112 is a wasteful number, since it uses less digits than its factorization.

21150005112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831452 (or 6831445 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The spelling of 21150005112 in words is "twenty-one billion, one hundred fifty million, five thousand, one hundred twelve".