2202001421 has 4 divisors (see below), whose sum is σ = 2226743100. Its totient is φ = 2177259744.

The previous prime is 2202001367. The next prime is 2202001423. The reversal of 2202001421 is 1241002022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 430770025 + 1771231396 = 20755^2 + 42086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2202001421 - 2⁶ = 2202001357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2202001396 and 2202001405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202001423) 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, 12370706 + ... + 12370883.

It is an arithmetic number, because the mean of its divisors is an integer number (556685775).

Almost surely, 2^2202001421 is an apocalyptic number.

It is an amenable number.

2202001421 is a deficient number, since it is larger than the sum of its proper divisors (24741679).

2202001421 is an equidigital number, since it uses as much as digits as its factorization.

2202001421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24741678.

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

The square root of 2202001421 is about 46925.4879676280. The cubic root of 2202001421 is about 1300.9857259537.

Adding to 2202001421 its reverse (1241002022), we get a palindrome (3443003443).

The spelling of 2202001421 in words is "two billion, two hundred two million, one thousand, four hundred twenty-one".