22101220157 has 2 divisors, whose sum is σ = 22101220158. Its totient is φ = 22101220156.

The previous prime is 22101220153. The next prime is 22101220181. The reversal of 22101220157 is 75102210122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12102420121 + 9998800036 = 110011^2 + 99994^2 .

It is a cyclic number.

It is not a de Polignac number, because 22101220157 - 2² = 22101220153 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22101220153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050610078 + 11050610079.

It is an arithmetic number, because the mean of its divisors is an integer number (11050610079).

Almost surely, 2^22101220157 is an apocalyptic number.

It is an amenable number.

22101220157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22101220157 is an equidigital number, since it uses as much as digits as its factorization.

22101220157 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 22101220157 its reverse (75102210122), we get a palindrome (97203430279).

The spelling of 22101220157 in words is "twenty-two billion, one hundred one million, two hundred twenty thousand, one hundred fifty-seven".