121122111157 has 2 divisors, whose sum is σ = 121122111158. Its totient is φ = 121122111156.

The previous prime is 121122111079. The next prime is 121122111191. The reversal of 121122111157 is 751111221121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107207785476 + 13914325681 = 327426^2 + 117959^2 .

It is a cyclic number.

It is not a de Polignac number, because 121122111157 - 2²³ = 121113722549 is a prime.

It is a super-2 number, since 2×121122111157² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121122811157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60561055578 + 60561055579.

It is an arithmetic number, because the mean of its divisors is an integer number (60561055579).

Almost surely, 2^121122111157 is an apocalyptic number.

It is an amenable number.

121122111157 is a deficient number, since it is larger than the sum of its proper divisors (1).

121122111157 is an equidigital number, since it uses as much as digits as its factorization.

121122111157 is an odious number, because the sum of its binary digits is odd.

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

Adding to 121122111157 its reverse (751111221121), we get a palindrome (872233332278).

The spelling of 121122111157 in words is "one hundred twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, one hundred fifty-seven".