221013011121 has 16 divisors (see below), whose sum is σ = 336967753728. Its totient is φ = 126223390800.

The previous prime is 221013011113. The next prime is 221013011179. The reversal of 221013011121 is 121110310122.

It is not a de Polignac number, because 221013011121 - 2³ = 221013011113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221013011121.

It is not an unprimeable number, because it can be changed into a prime (221013011111) 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, 2867665 + ... + 2943726.

It is an arithmetic number, because the mean of its divisors is an integer number (21060484608).

Almost surely, 2^221013011121 is an apocalyptic number.

221013011121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221013011121 is a deficient number, since it is larger than the sum of its proper divisors (115954742607).

221013011121 is a wasteful number, since it uses less digits than its factorization.

221013011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5813212.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 221013011121 its reverse (121110310122), we get a palindrome (342123321243).

The spelling of 221013011121 in words is "two hundred twenty-one billion, thirteen million, eleven thousand, one hundred twenty-one".