21220010131 has 8 divisors (see below), whose sum is σ = 21285282528. Its totient is φ = 21154800000.

The previous prime is 21220010107. The next prime is 21220010137. The reversal of 21220010131 is 13101002212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21220010131 - 2²³ = 21211621523 is a prime.

It is a super-2 number, since 2×21220010131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220010137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 719781 + ... + 748681.

It is an arithmetic number, because the mean of its divisors is an integer number (2660660316).

Almost surely, 2^21220010131 is an apocalyptic number.

21220010131 is a deficient number, since it is larger than the sum of its proper divisors (65272397).

21220010131 is a wasteful number, since it uses less digits than its factorization.

21220010131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31133.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21220010131 its reverse (13101002212), we get a palindrome (34321012343).

The spelling of 21220010131 in words is "twenty-one billion, two hundred twenty million, ten thousand, one hundred thirty-one".