121015517023 has 8 divisors (see below), whose sum is σ = 121128791040. Its totient is φ = 120902286840.

The previous prime is 121015516907. The next prime is 121015517069. The reversal of 121015517023 is 320715510121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121015517023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121015516982 and 121015517000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121015517123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8152218 + ... + 8167048.

It is an arithmetic number, because the mean of its divisors is an integer number (15141098880).

Almost surely, 2^121015517023 is an apocalyptic number.

121015517023 is a deficient number, since it is larger than the sum of its proper divisors (113274017).

121015517023 is a wasteful number, since it uses less digits than its factorization.

121015517023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21917.

The product of its (nonzero) digits is 2100, while the sum is 28.

The spelling of 121015517023 in words is "one hundred twenty-one billion, fifteen million, five hundred seventeen thousand, twenty-three".