1220222221101 has 24 divisors (see below), whose sum is σ = 1909354985720. Its totient is φ = 750905970048.

The previous prime is 1220222221093. The next prime is 1220222221133. The reversal of 1220222221101 is 1011222220221.

It is a happy number.

1220222221101 is a `hidden beast` number, since 1 + 220 + 222 + 221 + 1 + 0 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 643380452100 + 576841769001 = 802110^2 + 759501^2 .

It is not a de Polignac number, because 1220222221101 - 2³ = 1220222221093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220222231101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30835996 + ... + 30875541.

Almost surely, 2^{1220222221101} is an apocalyptic number.

It is an amenable number.

1220222221101 is a deficient number, since it is larger than the sum of its proper divisors (689132764619).

1220222221101 is an equidigital number, since it uses as much as digits as its factorization.

1220222221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61711582 (or 61711553 counting only the distinct ones).

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

Adding to 1220222221101 its reverse (1011222220221), we get a palindrome (2231444441322).

The spelling of 1220222221101 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred one".