21010516112 has 20 divisors (see below), whose sum is σ = 41110926396. Its totient is φ = 10401244800.

The previous prime is 21010516099. The next prime is 21010516139. The reversal of 21010516112 is 21161501012.

It can be written as a sum of positive squares in 2 ways, for example, as 20259536896 + 750979216 = 142336^2 + 27404^2 .

It is a super-2 number, since 2×21010516112² (a number of 21 digits) contains 22 as substring.

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, 6499163 + ... + 6502394.

Almost surely, 2^21010516112 is an apocalyptic number.

It is an amenable number.

21010516112 is a deficient number, since it is larger than the sum of its proper divisors (20100410284).

21010516112 is a wasteful number, since it uses less digits than its factorization.

21010516112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13001666 (or 13001660 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 20.

The spelling of 21010516112 in words is "twenty-one billion, ten million, five hundred sixteen thousand, one hundred twelve".