121521483615 has 16 divisors (see below), whose sum is σ = 222210713088. Its totient is φ = 55552678176.

The previous prime is 121521483557. The next prime is 121521483619. The reversal of 121521483615 is 516384125121.

It is not a de Polignac number, because 121521483615 - 2⁹ = 121521483103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121521483619) 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, 578673627 + ... + 578673836.

It is an arithmetic number, because the mean of its divisors is an integer number (13888169568).

Almost surely, 2^121521483615 is an apocalyptic number.

121521483615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121521483615 is a deficient number, since it is larger than the sum of its proper divisors (100689229473).

121521483615 is a wasteful number, since it uses less digits than its factorization.

121521483615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157347478.

The product of its digits is 57600, while the sum is 39.

The spelling of 121521483615 in words is "one hundred twenty-one billion, five hundred twenty-one million, four hundred eighty-three thousand, six hundred fifteen".