1222118162221 has 6 divisors (see below), whose sum is σ = 1343319963566. Its totient is φ = 1111016511000.

The previous prime is 1222118162143. The next prime is 1222118162281. The reversal of 1222118162221 is 1222618112221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 887149236996 + 334968925225 = 941886^2 + 578765^2 .

It is not a de Polignac number, because 1222118162221 - 2¹¹ = 1222118160173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222118162281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5050074930 + ... + 5050075171.

Almost surely, 2^{1222118162221} is an apocalyptic number.

1222118162221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222118162221 is a deficient number, since it is larger than the sum of its proper divisors (121201801345).

1222118162221 is a wasteful number, since it uses less digits than its factorization.

1222118162221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100150123 (or 10100150112 counting only the distinct ones).

The product of its digits is 3072, while the sum is 31.

The spelling of 1222118162221 in words is "one trillion, two hundred twenty-two billion, one hundred eighteen million, one hundred sixty-two thousand, two hundred twenty-one".