121135331565431 has 4 divisors (see below), whose sum is σ = 128260939304592. Its totient is φ = 114009723826272.

The previous prime is 121135331565421. The next prime is 121135331565449. The reversal of 121135331565431 is 134565133531121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121135331565431 - 2²² = 121135327371127 is a prime.

It is a super-2 number, since 2×121135331565431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121135331565421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3562803869555 + ... + 3562803869588.

It is an arithmetic number, because the mean of its divisors is an integer number (32065234826148).

Almost surely, 2^{121135331565431} is an apocalyptic number.

121135331565431 is a deficient number, since it is larger than the sum of its proper divisors (7125607739161).

121135331565431 is an equidigital number, since it uses as much as digits as its factorization.

121135331565431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7125607739160.

The product of its digits is 486000, while the sum is 44.

The spelling of 121135331565431 in words is "one hundred twenty-one trillion, one hundred thirty-five billion, three hundred thirty-one million, five hundred sixty-five thousand, four hundred thirty-one".