21121586476 has 12 divisors (see below), whose sum is σ = 37568723920. Its totient is φ = 10387665360.

The previous prime is 21121586467. The next prime is 21121586483. The reversal of 21121586476 is 67468512112.

It is a super-2 number, since 2×21121586476² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43281696 + ... + 43282183.

Almost surely, 2^21121586476 is an apocalyptic number.

It is an amenable number.

21121586476 is a deficient number, since it is larger than the sum of its proper divisors (16447137444).

21121586476 is a wasteful number, since it uses less digits than its factorization.

21121586476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86563944 (or 86563942 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The spelling of 21121586476 in words is "twenty-one billion, one hundred twenty-one million, five hundred eighty-six thousand, four hundred seventy-six".