121610157965 has 8 divisors (see below), whose sum is σ = 145938306528. Its totient is φ = 97284048400.

The previous prime is 121610157953. The next prime is 121610157971. The reversal of 121610157965 is 569751016121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121610157965 - 2¹⁴ = 121610141581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375311 + ... + 619740.

It is an arithmetic number, because the mean of its divisors is an integer number (18242288316).

Almost surely, 2^121610157965 is an apocalyptic number.

It is an amenable number.

121610157965 is a deficient number, since it is larger than the sum of its proper divisors (24328148563).

121610157965 is an equidigital number, since it uses as much as digits as its factorization.

121610157965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019499.

The product of its (nonzero) digits is 113400, while the sum is 44.

The spelling of 121610157965 in words is "one hundred twenty-one billion, six hundred ten million, one hundred fifty-seven thousand, nine hundred sixty-five".