1222266622221 has 18 divisors (see below), whose sum is σ = 1814501989482. Its totient is φ = 792821584800.

The previous prime is 1222266622177. The next prime is 1222266622223.

1222266622221 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 3 ways, for example, as 724437597321 + 497829024900 = 851139^2 + 705570^2 .

It is not a de Polignac number, because 1222266622221 - 2¹¹ = 1222266620173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222266622223) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 49588630 + ... + 49613271.

Almost surely, 2^{1222266622221} is an apocalyptic number.

It is an amenable number.

1222266622221 is a deficient number, since it is larger than the sum of its proper divisors (592235367261).

1222266622221 is an equidigital number, since it uses as much as digits as its factorization.

1222266622221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99201981 (or 99201941 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The spelling of 1222266622221 in words is "one trillion, two hundred twenty-two billion, two hundred sixty-six million, six hundred twenty-two thousand, two hundred twenty-one".