2202112021 has 4 divisors (see below), whose sum is σ = 2221599852. Its totient is φ = 2182624192.

The previous prime is 2202111991. The next prime is 2202112043. The reversal of 2202112021 is 1202112022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1202112022 = 2 ⋅601056011.

It can be written as a sum of positive squares in 2 ways, for example, as 875331396 + 1326780625 = 29586^2 + 36425^2 .

It is a cyclic number.

It is not a de Polignac number, because 2202112021 - 2²⁷ = 2067894293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2202111992 and 2202112010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202112061) 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, 9743746 + ... + 9743971.

It is an arithmetic number, because the mean of its divisors is an integer number (555399963).

Almost surely, 2^2202112021 is an apocalyptic number.

It is an amenable number.

2202112021 is a deficient number, since it is larger than the sum of its proper divisors (19487831).

2202112021 is a wasteful number, since it uses less digits than its factorization.

2202112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19487830.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2202112021 is about 46926.6664168679. Note that the first 3 decimals coincide. The cubic root of 2202112021 is about 1301.0075071404.

Adding to 2202112021 its reverse (1202112022), we get a palindrome (3404224043).

Subtracting from 2202112021 its reverse (1202112022), we obtain a palindrome (999999999).

The spelling of 2202112021 in words is "two billion, two hundred two million, one hundred twelve thousand, twenty-one".