22157348740981 has 2 divisors, whose sum is σ = 22157348740982. Its totient is φ = 22157348740980.

The previous prime is 22157348740979. The next prime is 22157348741023. The reversal of 22157348740981 is 18904784375122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21756944540356 + 400404200625 = 4664434^2 + 632775^2 .

It is a cyclic number.

It is not a de Polignac number, because 22157348740981 - 2¹ = 22157348740979 is a prime.

It is a super-2 number, since 2×22157348740981² (a number of 27 digits) contains 22 as substring.

Together with 22157348740979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22157348740931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11078674370490 + 11078674370491.

It is an arithmetic number, because the mean of its divisors is an integer number (11078674370491).

Almost surely, 2^{22157348740981} is an apocalyptic number.

It is an amenable number.

22157348740981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22157348740981 is an equidigital number, since it uses as much as digits as its factorization.

22157348740981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 22157348740981 in words is "twenty-two trillion, one hundred fifty-seven billion, three hundred forty-eight million, seven hundred forty thousand, nine hundred eighty-one".