22121631584881 has 2 divisors, whose sum is σ = 22121631584882. Its totient is φ = 22121631584880.

The previous prime is 22121631584879. The next prime is 22121631584903. The reversal of 22121631584881 is 18848513612122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21785742950400 + 335888634481 = 4667520^2 + 579559^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121631584881 - 2¹ = 22121631584879 is a prime.

It is a super-2 number, since 2×22121631584881² (a number of 27 digits) contains 22 as substring.

Together with 22121631584879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22121631584831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060815792440 + 11060815792441.

It is an arithmetic number, because the mean of its divisors is an integer number (11060815792441).

Almost surely, 2^{22121631584881} is an apocalyptic number.

It is an amenable number.

22121631584881 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121631584881 is an equidigital number, since it uses as much as digits as its factorization.

22121631584881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1474560, while the sum is 52.

The spelling of 22121631584881 in words is "twenty-two trillion, one hundred twenty-one billion, six hundred thirty-one million, five hundred eighty-four thousand, eight hundred eighty-one".