2202120221 has 6 divisors (see below), whose sum is σ = 2561650110. Its totient is φ = 1887531576.

The previous prime is 2202120203. The next prime is 2202120223. The reversal of 2202120221 is 1220212022.

It can be written as a sum of positive squares in only one way, i.e., 2189772025 + 12348196 = 46795^2 + 3514^2 .

It is not a de Polignac number, because 2202120221 - 2²⁶ = 2135011357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2202120196 and 2202120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202120223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22470566 + ... + 22470663.

It is an arithmetic number, because the mean of its divisors is an integer number (426941685).

Almost surely, 2^2202120221 is an apocalyptic number.

It is an amenable number.

2202120221 is a deficient number, since it is larger than the sum of its proper divisors (359529889).

2202120221 is an equidigital number, since it uses as much as digits as its factorization.

2202120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44941243 (or 44941236 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2202120221 is about 46926.7537871522. The cubic root of 2202120221 is about 1301.0091219914.

Adding to 2202120221 its reverse (1220212022), we get a palindrome (3422332243).

The spelling of 2202120221 in words is "two billion, two hundred two million, one hundred twenty thousand, two hundred twenty-one".