402211213021 has 2 divisors, whose sum is σ = 402211213022. Its totient is φ = 402211213020.

The previous prime is 402211212941. The next prime is 402211213031. The reversal of 402211213021 is 120312112204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400094200900 + 2117012121 = 632530^2 + 46011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402211213021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402211213021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402211213031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201105606510 + 201105606511.

It is an arithmetic number, because the mean of its divisors is an integer number (201105606511).

Almost surely, 2^402211213021 is an apocalyptic number.

It is an amenable number.

402211213021 is a deficient number, since it is larger than the sum of its proper divisors (1).

402211213021 is an equidigital number, since it uses as much as digits as its factorization.

402211213021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 402211213021 its reverse (120312112204), we get a palindrome (522523325225).

The spelling of 402211213021 in words is "four hundred two billion, two hundred eleven million, two hundred thirteen thousand, twenty-one".