52121521112015 has 4 divisors (see below), whose sum is σ = 62545825334424. Its totient is φ = 41697216889608.

The previous prime is 52121521112009. The next prime is 52121521112069. The reversal of 52121521112015 is 51021112512125.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52121521112015 - 2¹⁰ = 52121521110991 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 3 ways as a sum of consecutive naturals, for example, 5212152111197 + ... + 5212152111206.

It is an arithmetic number, because the mean of its divisors is an integer number (15636456333606).

Almost surely, 2^{52121521112015} is an apocalyptic number.

52121521112015 is a deficient number, since it is larger than the sum of its proper divisors (10424304222409).

52121521112015 is a wasteful number, since it uses less digits than its factorization.

52121521112015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10424304222408.

The product of its (nonzero) digits is 2000, while the sum is 29.

The spelling of 52121521112015 in words is "fifty-two trillion, one hundred twenty-one billion, five hundred twenty-one million, one hundred twelve thousand, fifteen".