21150215404012 has 48 divisors (see below), whose sum is σ = 37709411241600. Its totient is φ = 10378053797760.

The previous prime is 21150215403983. The next prime is 21150215404039. The reversal of 21150215404012 is 21040451205112.

It is a super-2 number, since 2×21150215404012² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42636087 + ... + 43129297.

It is an arithmetic number, because the mean of its divisors is an integer number (785612734200).

Almost surely, 2^{21150215404012} is an apocalyptic number.

It is an amenable number.

21150215404012 is a deficient number, since it is larger than the sum of its proper divisors (16559195837588).

21150215404012 is a wasteful number, since it uses less digits than its factorization.

21150215404012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494206 (or 494204 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 21150215404012 its reverse (21040451205112), we get a palindrome (42190666609124).

The spelling of 21150215404012 in words is "twenty-one trillion, one hundred fifty billion, two hundred fifteen million, four hundred four thousand, twelve".