121161157 has 16 divisors (see below), whose sum is σ = 138376000. Its totient is φ = 105162624.

The previous prime is 121161151. The next prime is 121161163. The reversal of 121161157 is 751161121.

It is an interprime number because it is at equal distance from previous prime (121161151) and next prime (121161163).

It is a cyclic number.

It is not a de Polignac number, because 121161157 - 2³ = 121161149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121161151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32569 + ... + 36097.

It is an arithmetic number, because the mean of its divisors is an integer number (8648500).

Almost surely, 2^121161157 is an apocalyptic number.

It is an amenable number.

121161157 is a deficient number, since it is larger than the sum of its proper divisors (17214843).

121161157 is a wasteful number, since it uses less digits than its factorization.

121161157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700.

The product of its digits is 420, while the sum is 25.

The square root of 121161157 is about 11007.3228807008. The cubic root of 121161157 is about 494.8282327540.

The spelling of 121161157 in words is "one hundred twenty-one million, one hundred sixty-one thousand, one hundred fifty-seven".