22311421381 has 2 divisors, whose sum is σ = 22311421382. Its totient is φ = 22311421380.

The previous prime is 22311421361. The next prime is 22311421493. The reversal of 22311421381 is 18312411322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18369465156 + 3941956225 = 135534^2 + 62785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22311421381 is a prime.

It is a super-3 number, since 3×22311421381³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22311421361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11155710690 + 11155710691.

It is an arithmetic number, because the mean of its divisors is an integer number (11155710691).

Almost surely, 2^22311421381 is an apocalyptic number.

It is an amenable number.

22311421381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22311421381 is an equidigital number, since it uses as much as digits as its factorization.

22311421381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The spelling of 22311421381 in words is "twenty-two billion, three hundred eleven million, four hundred twenty-one thousand, three hundred eighty-one".