22012102157 has 2 divisors, whose sum is σ = 22012102158. Its totient is φ = 22012102156.

The previous prime is 22012102111. The next prime is 22012102159. The reversal of 22012102157 is 75120121022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12208924036 + 9803178121 = 110494^2 + 99011^2 .

It is a cyclic number.

It is not a de Polignac number, because 22012102157 - 2²² = 22007907853 is a prime.

Together with 22012102159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22012102159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006051078 + 11006051079.

It is an arithmetic number, because the mean of its divisors is an integer number (11006051079).

Almost surely, 2^22012102157 is an apocalyptic number.

It is an amenable number.

22012102157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22012102157 is an equidigital number, since it uses as much as digits as its factorization.

22012102157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 22012102157 its reverse (75120121022), we get a palindrome (97132223179).

The spelling of 22012102157 in words is "twenty-two billion, twelve million, one hundred two thousand, one hundred fifty-seven".