21221000021113 has 12 divisors (see below), whose sum is σ = 23522841613440. Its totient is φ = 19104327378752.

The previous prime is 21221000021083. The next prime is 21221000021153. The reversal of 21221000021113 is 31112000012212.

It is not a de Polignac number, because 21221000021113 - 2⁹ = 21221000020601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221000021153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1596277393 + ... + 1596290686.

It is an arithmetic number, because the mean of its divisors is an integer number (1960236801120).

Almost surely, 2^{21221000021113} is an apocalyptic number.

21221000021113 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21221000021113 is a deficient number, since it is larger than the sum of its proper divisors (2301841592327).

21221000021113 is a wasteful number, since it uses less digits than its factorization.

21221000021113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192568136 (or 3192568119 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21221000021113 its reverse (31112000012212), we get a palindrome (52333000033325).

The spelling of 21221000021113 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-one thousand, one hundred thirteen".