100121121157 has 2 divisors, whose sum is σ = 100121121158. Its totient is φ = 100121121156.

The previous prime is 100121121143. The next prime is 100121121169. The reversal of 100121121157 is 751121121001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62020423521 + 38100697636 = 249039^2 + 195194^2 .

It is a cyclic number.

It is not a de Polignac number, because 100121121157 - 2²³ = 100112732549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100121127157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060560578 + 50060560579.

It is an arithmetic number, because the mean of its divisors is an integer number (50060560579).

Almost surely, 2^100121121157 is an apocalyptic number.

It is an amenable number.

100121121157 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121121157 is an equidigital number, since it uses as much as digits as its factorization.

100121121157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 22.

Adding to 100121121157 its reverse (751121121001), we get a palindrome (851242242158).

The spelling of 100121121157 in words is "one hundred billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred fifty-seven".