21122013574 has 32 divisors (see below), whose sum is σ = 33094220544. Its totient is φ = 10101567840.

The previous prime is 21122013557. The next prime is 21122013581. The reversal of 21122013574 is 47531022112.

It is a super-2 number, since 2×21122013574² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 2562039 + ... + 2570269.

It is an arithmetic number, because the mean of its divisors is an integer number (1034194392).

Almost surely, 2^21122013574 is an apocalyptic number.

21122013574 is a deficient number, since it is larger than the sum of its proper divisors (11972206970).

21122013574 is a wasteful number, since it uses less digits than its factorization.

21122013574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8892.

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 21122013574 its reverse (47531022112), we get a palindrome (68653035686).

The spelling of 21122013574 in words is "twenty-one billion, one hundred twenty-two million, thirteen thousand, five hundred seventy-four".