8222660651021 has 12 divisors (see below), whose sum is σ = 8892115276380. Its totient is φ = 7593941456640.

The previous prime is 8222660651003. The next prime is 8222660651027. The reversal of 8222660651021 is 1201560662228.

It can be written as a sum of positive squares in 2 ways, for example, as 1295815678921 + 6926844972100 = 1138339^2 + 2631890^2 .

It is not a de Polignac number, because 8222660651021 - 2²⁶ = 8222593542157 is a prime.

It is a super-2 number, since 2×8222660651021² (a number of 27 digits) contains 22 as substring.

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 8222660651021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8222660651027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267980900 + ... + 268011581.

It is an arithmetic number, because the mean of its divisors is an integer number (741009606365).

Almost surely, 2^{8222660651021} is an apocalyptic number.

It is an amenable number.

8222660651021 is a deficient number, since it is larger than the sum of its proper divisors (669454625359).

8222660651021 is a wasteful number, since it uses less digits than its factorization.

8222660651021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535992556 (or 535992533 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 8222660651021 in words is "eight trillion, two hundred twenty-two billion, six hundred sixty million, six hundred fifty-one thousand, twenty-one".