402113013221 has 2 divisors, whose sum is σ = 402113013222. Its totient is φ = 402113013220.

The previous prime is 402113013199. The next prime is 402113013319. The reversal of 402113013221 is 122310311204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340553944900 + 61559068321 = 583570^2 + 248111^2 .

It is a cyclic number.

It is not a de Polignac number, because 402113013221 - 2²⁶ = 402045904357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402113013193 and 402113013202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402113015221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201056506610 + 201056506611.

It is an arithmetic number, because the mean of its divisors is an integer number (201056506611).

Almost surely, 2^402113013221 is an apocalyptic number.

It is an amenable number.

402113013221 is a deficient number, since it is larger than the sum of its proper divisors (1).

402113013221 is an equidigital number, since it uses as much as digits as its factorization.

402113013221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 402113013221 its reverse (122310311204), we get a palindrome (524423324425).

The spelling of 402113013221 in words is "four hundred two billion, one hundred thirteen million, thirteen thousand, two hundred twenty-one".