402221011034521 has 8 divisors (see below), whose sum is σ = 469062403539200. Its totient is φ = 344760866600724.

The previous prime is 402221011034503. The next prime is 402221011034533. The reversal of 402221011034521 is 125430110122204.

It is a happy number.

It is not a de Polignac number, because 402221011034521 - 2¹⁵ = 402221011001753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402221011034521.

It is not an unprimeable number, because it can be changed into a prime (402221011434521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 586328004081 + ... + 586328004766.

It is an arithmetic number, because the mean of its divisors is an integer number (58632800442400).

Almost surely, 2^{402221011034521} is an apocalyptic number.

It is an amenable number.

402221011034521 is a deficient number, since it is larger than the sum of its proper divisors (66841392504679).

402221011034521 is an equidigital number, since it uses as much as digits as its factorization.

402221011034521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172656008868 (or 1172656008854 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 402221011034521 its reverse (125430110122204), we get a palindrome (527651121156725).

The spelling of 402221011034521 in words is "four hundred two trillion, two hundred twenty-one billion, eleven million, thirty-four thousand, five hundred twenty-one".