21323222131 has 8 divisors (see below), whose sum is σ = 22463099280. Its totient is φ = 20185105248.

The previous prime is 21323222069. The next prime is 21323222143. The reversal of 21323222131 is 13122232312.

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 21323222131 - 2⁷ = 21323222003 is a prime.

It is a super-2 number, since 2×21323222131² (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 (21323222161) 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, 415156 + ... + 463681.

It is an arithmetic number, because the mean of its divisors is an integer number (2807887410).

Almost surely, 2^21323222131 is an apocalyptic number.

21323222131 is a deficient number, since it is larger than the sum of its proper divisors (1139877149).

21323222131 is a wasteful number, since it uses less digits than its factorization.

21323222131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880133.

The product of its digits is 864, while the sum is 22.

Adding to 21323222131 its reverse (13122232312), we get a palindrome (34445454443).

The spelling of 21323222131 in words is "twenty-one billion, three hundred twenty-three million, two hundred twenty-two thousand, one hundred thirty-one".