22000221157 has 2 divisors, whose sum is σ = 22000221158. Its totient is φ = 22000221156.

The previous prime is 22000221017. The next prime is 22000221223. The reversal of 22000221157 is 75112200022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21947237316 + 52983841 = 148146^2 + 7279^2 .

It is a cyclic number.

It is not a de Polignac number, because 22000221157 - 2²⁷ = 21866003429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22000222157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000110578 + 11000110579.

It is an arithmetic number, because the mean of its divisors is an integer number (11000110579).

Almost surely, 2^22000221157 is an apocalyptic number.

It is an amenable number.

22000221157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000221157 is an equidigital number, since it uses as much as digits as its factorization.

22000221157 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 22.

Adding to 22000221157 its reverse (75112200022), we get a palindrome (97112421179).

The spelling of 22000221157 in words is "twenty-two billion, two hundred twenty-one thousand, one hundred fifty-seven".