21521113034 has 16 divisors (see below), whose sum is σ = 34105363200. Its totient is φ = 10168448304.

The previous prime is 21521112941. The next prime is 21521113049. The reversal of 21521113034 is 43031112512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3944654 + ... + 3950105.

It is an arithmetic number, because the mean of its divisors is an integer number (2131585200).

Almost surely, 2^21521113034 is an apocalyptic number.

21521113034 is a deficient number, since it is larger than the sum of its proper divisors (12584250166).

21521113034 is a wasteful number, since it uses less digits than its factorization.

21521113034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7894837.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21521113034 its reverse (43031112512), we get a palindrome (64552225546).

The spelling of 21521113034 in words is "twenty-one billion, five hundred twenty-one million, one hundred thirteen thousand, thirty-four".