2202202421 has 4 divisors (see below), whose sum is σ = 2221691052. Its totient is φ = 2182713792.

The previous prime is 2202202411. The next prime is 2202202439. The reversal of 2202202421 is 1242022022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1242022022 = 2 ⋅621011011.

It can be written as a sum of positive squares in 2 ways, for example, as 1074921796 + 1127280625 = 32786^2 + 33575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2202202421 is a prime.

It is a super-2 number, since 2×2202202421² = 9699391006116522482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2202202421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202202411) 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, 9744146 + ... + 9744371.

It is an arithmetic number, because the mean of its divisors is an integer number (555422763).

Almost surely, 2^2202202421 is an apocalyptic number.

It is an amenable number.

2202202421 is a deficient number, since it is larger than the sum of its proper divisors (19488631).

2202202421 is a wasteful number, since it uses less digits than its factorization.

2202202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19488630.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2202202421 is about 46927.6296119887. The cubic root of 2202202421 is about 1301.0253096664.

Adding to 2202202421 its reverse (1242022022), we get a palindrome (3444224443).

The spelling of 2202202421 in words is "two billion, two hundred two million, two hundred two thousand, four hundred twenty-one".