121751157 has 16 divisors (see below), whose sum is σ = 178850880. Its totient is φ = 73056000.

The previous prime is 121751153. The next prime is 121751159. The reversal of 121751157 is 751157121.

It is not a de Polignac number, because 121751157 - 2² = 121751153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121751153) 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, 14932 + ... + 21597.

It is an arithmetic number, because the mean of its divisors is an integer number (11178180).

Almost surely, 2^121751157 is an apocalyptic number.

It is an amenable number.

121751157 is a deficient number, since it is larger than the sum of its proper divisors (57099723).

121751157 is a wasteful number, since it uses less digits than its factorization.

121751157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36644.

The product of its digits is 2450, while the sum is 30.

The square root of 121751157 is about 11034.0906739069. The cubic root of 121751157 is about 495.6301290505.

The spelling of 121751157 in words is "one hundred twenty-one million, seven hundred fifty-one thousand, one hundred fifty-seven".