221002010015 has 4 divisors (see below), whose sum is σ = 265202412024. Its totient is φ = 176801608008.

The previous prime is 221002010011. The next prime is 221002010039. The reversal of 221002010015 is 510010200122.

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 221002010015 - 2² = 221002010011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002010011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22100200997 + ... + 22100201006.

It is an arithmetic number, because the mean of its divisors is an integer number (66300603006).

Almost surely, 2^221002010015 is an apocalyptic number.

221002010015 is a deficient number, since it is larger than the sum of its proper divisors (44200402009).

221002010015 is an equidigital number, since it uses as much as digits as its factorization.

221002010015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44200402008.

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 221002010015 its reverse (510010200122), we get a palindrome (731012210137).

The spelling of 221002010015 in words is "two hundred twenty-one billion, two million, ten thousand, fifteen".