1122222021021 has 6 divisors (see below), whose sum is σ = 1620987363710. Its totient is φ = 748148014008.

The previous prime is 1122222021017. The next prime is 1122222021023. The reversal of 1122222021021 is 1201202222211.

It is a happy number.

1122222021021 is a `hidden beast` number, since 11 + 222 + 220 + 210 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1056064522500 + 66157498521 = 1027650^2 + 257211^2 .

It is not a de Polignac number, because 1122222021021 - 2² = 1122222021017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122222020985 and 1122222021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122222021023) 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, 62345667826 + ... + 62345667843.

Almost surely, 2^{1122222021021} is an apocalyptic number.

It is an amenable number.

1122222021021 is a deficient number, since it is larger than the sum of its proper divisors (498765342689).

1122222021021 is a wasteful number, since it uses less digits than its factorization.

1122222021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124691335675 (or 124691335672 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1122222021021 its reverse (1201202222211), we get a palindrome (2323424243232).

The spelling of 1122222021021 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-two million, twenty-one thousand, twenty-one".