21223133131 has 8 divisors (see below), whose sum is σ = 21448428624. Its totient is φ = 20998135200.

The previous prime is 21223133051. The next prime is 21223133143. The reversal of 21223133131 is 13133132212.

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 21223133131 - 2²⁵ = 21189578699 is a prime.

It is a super-2 number, since 2×21223133131² (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 (21223133431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70501 + ... + 217753.

It is an arithmetic number, because the mean of its divisors is an integer number (2681053578).

Almost surely, 2^21223133131 is an apocalyptic number.

21223133131 is a deficient number, since it is larger than the sum of its proper divisors (225295493).

21223133131 is a wasteful number, since it uses less digits than its factorization.

21223133131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148781.

The product of its digits is 648, while the sum is 22.

Adding to 21223133131 its reverse (13133132212), we get a palindrome (34356265343).

The spelling of 21223133131 in words is "twenty-one billion, two hundred twenty-three million, one hundred thirty-three thousand, one hundred thirty-one".