22157348741021 has 4 divisors (see below), whose sum is σ = 23861760182652. Its totient is φ = 20452937299392.

The previous prime is 22157348740981. The next prime is 22157348741023. The reversal of 22157348741021 is 12014784375122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1181992968025 + 20975355772996 = 1087195^2 + 4579886^2 .

It is not a de Polignac number, because 22157348741021 - 2⁶ = 22157348740957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22157348741023) 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, 852205720796 + ... + 852205720821.

It is an arithmetic number, because the mean of its divisors is an integer number (5965440045663).

Almost surely, 2^{22157348741021} is an apocalyptic number.

It is an amenable number.

22157348741021 is a deficient number, since it is larger than the sum of its proper divisors (1704411441631).

22157348741021 is a wasteful number, since it uses less digits than its factorization.

22157348741021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704411441630.

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 22157348741021 in words is "twenty-two trillion, one hundred fifty-seven billion, three hundred forty-eight million, seven hundred forty-one thousand, twenty-one".