22021311311971 has 2 divisors, whose sum is σ = 22021311311972. Its totient is φ = 22021311311970.

The previous prime is 22021311311959. The next prime is 22021311312029. The reversal of 22021311311971 is 17911311312022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22021311311971 - 2⁵ = 22021311311939 is a prime.

It is not a weakly prime, because it can be changed into another prime (22021311311911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010655655985 + 11010655655986.

It is an arithmetic number, because the mean of its divisors is an integer number (11010655655986).

Almost surely, 2^{22021311311971} is an apocalyptic number.

22021311311971 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021311311971 is an equidigital number, since it uses as much as digits as its factorization.

22021311311971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

Adding to 22021311311971 its reverse (17911311312022), we get a palindrome (39932622623993).

The spelling of 22021311311971 in words is "twenty-two trillion, twenty-one billion, three hundred eleven million, three hundred eleven thousand, nine hundred seventy-one".