21322301331 has 4 divisors (see below), whose sum is σ = 28429735112. Its totient is φ = 14214867552.

The previous prime is 21322301327. The next prime is 21322301333. The reversal of 21322301331 is 13310322312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21322301331 - 2² = 21322301327 is a prime.

It is a super-2 number, since 2×21322301331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21322301298 and 21322301307.

It is not an unprimeable number, because it can be changed into a prime (21322301333) 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, 3553716886 + ... + 3553716891.

It is an arithmetic number, because the mean of its divisors is an integer number (7107433778).

Almost surely, 2^21322301331 is an apocalyptic number.

21322301331 is a deficient number, since it is larger than the sum of its proper divisors (7107433781).

21322301331 is an equidigital number, since it uses as much as digits as its factorization.

21322301331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7107433780.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21322301331 its reverse (13310322312), we get a palindrome (34632623643).

The spelling of 21322301331 in words is "twenty-one billion, three hundred twenty-two million, three hundred one thousand, three hundred thirty-one".