21221102010113 has 4 divisors (see below), whose sum is σ = 21221130883008. Its totient is φ = 21221073137220.

The previous prime is 21221102010077. The next prime is 21221102010161. The reversal of 21221102010113 is 31101020112212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21221102010113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21221102010091 and 21221102010100.

It is not an unprimeable number, because it can be changed into a prime (21221102010413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13304381 + ... + 14813802.

It is an arithmetic number, because the mean of its divisors is an integer number (5305282720752).

Almost surely, 2^{21221102010113} is an apocalyptic number.

It is an amenable number.

21221102010113 is a deficient number, since it is larger than the sum of its proper divisors (28872895).

21221102010113 is an equidigital number, since it uses as much as digits as its factorization.

21221102010113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28872894.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21221102010113 its reverse (31101020112212), we get a palindrome (52322122122325).

The spelling of 21221102010113 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred two million, ten thousand, one hundred thirteen".