402202412221 has 2 divisors, whose sum is σ = 402202412222. Its totient is φ = 402202412220.

The previous prime is 402202412189. The next prime is 402202412231. The reversal of 402202412221 is 122214202204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 398809932196 + 3392480025 = 631514^2 + 58245^2 .

It is a cyclic number.

It is not a de Polignac number, because 402202412221 - 2⁵ = 402202412189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402202412192 and 402202412201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402202412231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201101206110 + 201101206111.

It is an arithmetic number, because the mean of its divisors is an integer number (201101206111).

Almost surely, 2^402202412221 is an apocalyptic number.

It is an amenable number.

402202412221 is a deficient number, since it is larger than the sum of its proper divisors (1).

402202412221 is an equidigital number, since it uses as much as digits as its factorization.

402202412221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 402202412221 its reverse (122214202204), we get a palindrome (524416614425).

The spelling of 402202412221 in words is "four hundred two billion, two hundred two million, four hundred twelve thousand, two hundred twenty-one".