22121049157 has 2 divisors, whose sum is σ = 22121049158. Its totient is φ = 22121049156.

The previous prime is 22121049107. The next prime is 22121049163. The reversal of 22121049157 is 75194012122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16825721796 + 5295327361 = 129714^2 + 72769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121049157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121049107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060524578 + 11060524579.

It is an arithmetic number, because the mean of its divisors is an integer number (11060524579).

Almost surely, 2^22121049157 is an apocalyptic number.

It is an amenable number.

22121049157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121049157 is an equidigital number, since it uses as much as digits as its factorization.

22121049157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 22121049157 in words is "twenty-two billion, one hundred twenty-one million, forty-nine thousand, one hundred fifty-seven".