2111122110157 has 2 divisors, whose sum is σ = 2111122110158. Its totient is φ = 2111122110156.

The previous prime is 2111122110137. The next prime is 2111122110199. The reversal of 2111122110157 is 7510112211112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1496546075556 + 614576034601 = 1223334^2 + 783949^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111122110157 - 2⁷ = 2111122110029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111122110137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055561055078 + 1055561055079.

It is an arithmetic number, because the mean of its divisors is an integer number (1055561055079).

Almost surely, 2^{2111122110157} is an apocalyptic number.

It is an amenable number.

2111122110157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111122110157 is an equidigital number, since it uses as much as digits as its factorization.

2111122110157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 25.

Adding to 2111122110157 its reverse (7510112211112), we get a palindrome (9621234321269).

The spelling of 2111122110157 in words is "two trillion, one hundred eleven billion, one hundred twenty-two million, one hundred ten thousand, one hundred fifty-seven".