21223113113 has 4 divisors (see below), whose sum is σ = 21375797520. Its totient is φ = 21070428708.

The previous prime is 21223113103. The next prime is 21223113139. The reversal of 21223113113 is 31131132212.

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-21223113113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223113103) 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, 76341995 + ... + 76342272.

It is an arithmetic number, because the mean of its divisors is an integer number (5343949380).

Almost surely, 2^21223113113 is an apocalyptic number.

It is an amenable number.

21223113113 is a deficient number, since it is larger than the sum of its proper divisors (152684407).

21223113113 is a wasteful number, since it uses less digits than its factorization.

21223113113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152684406.

The product of its digits is 216, while the sum is 20.

Adding to 21223113113 its reverse (31131132212), we get a palindrome (52354245325).

The spelling of 21223113113 in words is "twenty-one billion, two hundred twenty-three million, one hundred thirteen thousand, one hundred thirteen".