121357131 has 16 divisors (see below), whose sum is σ = 192966144. Its totient is φ = 66331584.

The previous prime is 121357129. The next prime is 121357139. The reversal of 121357131 is 131753121.

It is a happy number.

It is not a de Polignac number, because 121357131 - 2¹ = 121357129 is a prime.

It is a super-2 number, since 2×121357131² = 29455106489102322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121357139) 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, 125146 + ... + 126111.

It is an arithmetic number, because the mean of its divisors is an integer number (12060384).

Almost surely, 2^121357131 is an apocalyptic number.

121357131 is a deficient number, since it is larger than the sum of its proper divisors (71609013).

121357131 is a wasteful number, since it uses less digits than its factorization.

121357131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251290.

The product of its digits is 630, while the sum is 24.

The square root of 121357131 is about 11016.2212668410. The cubic root of 121357131 is about 495.0948782524.

The spelling of 121357131 in words is "one hundred twenty-one million, three hundred fifty-seven thousand, one hundred thirty-one".