121663324615 has 16 divisors (see below), whose sum is σ = 167237921088. Its totient is φ = 83233598976.

The previous prime is 121663324597. The next prime is 121663324633. The reversal of 121663324615 is 516423366121.

It is an interprime number because it is at equal distance from previous prime (121663324597) and next prime (121663324633).

It is a cyclic number.

It is not a de Polignac number, because 121663324615 - 2¹⁵ = 121663291847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3998812 + ... + 4029121.

It is an arithmetic number, because the mean of its divisors is an integer number (10452370068).

Almost surely, 2^121663324615 is an apocalyptic number.

121663324615 is a deficient number, since it is larger than the sum of its proper divisors (45574596473).

121663324615 is an equidigital number, since it uses as much as digits as its factorization.

121663324615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8028378.

The product of its digits is 155520, while the sum is 40.

The spelling of 121663324615 in words is "one hundred twenty-one billion, six hundred sixty-three million, three hundred twenty-four thousand, six hundred fifteen".