121506501065 has 32 divisors (see below), whose sum is σ = 148697441280. Its totient is φ = 95299776000.

The previous prime is 121506501049. The next prime is 121506501071. The reversal of 121506501065 is 560105605121.

It is not a de Polignac number, because 121506501065 - 2⁴ = 121506501049 is a prime.

It is a super-2 number, since 2×121506501065² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45489680 + ... + 45492350.

It is an arithmetic number, because the mean of its divisors is an integer number (4646795040).

Almost surely, 2^121506501065 is an apocalyptic number.

It is an amenable number.

121506501065 is a deficient number, since it is larger than the sum of its proper divisors (27190940215).

121506501065 is a wasteful number, since it uses less digits than its factorization.

121506501065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3593.

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 121506501065 in words is "one hundred twenty-one billion, five hundred six million, five hundred one thousand, sixty-five".