2113221021 has 8 divisors (see below), whose sum is σ = 2965924320. Its totient is φ = 1334665872.

The previous prime is 2113221017. The next prime is 2113221029. The reversal of 2113221021 is 1201223112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2113221021 - 2² = 2113221017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113221029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18536970 + ... + 18537083.

It is an arithmetic number, because the mean of its divisors is an integer number (370740540).

Almost surely, 2^2113221021 is an apocalyptic number.

It is an amenable number.

2113221021 is a deficient number, since it is larger than the sum of its proper divisors (852703299).

2113221021 is a wasteful number, since it uses less digits than its factorization.

2113221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37074075.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2113221021 is about 45969.7837823934. The cubic root of 2113221021 is about 1283.2609360557.

Adding to 2113221021 its reverse (1201223112), we get a palindrome (3314444133).

The spelling of 2113221021 in words is "two billion, one hundred thirteen million, two hundred twenty-one thousand, twenty-one".