1222202122021 has 16 divisors (see below), whose sum is σ = 1251928282176. Its totient is φ = 1192791600000.

The previous prime is 1222202122019. The next prime is 1222202122049. The reversal of 1222202122021 is 1202212022221.

It is a cyclic number.

It is not a de Polignac number, because 1222202122021 - 2¹ = 1222202122019 is a prime.

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 1222202122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222202122051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79350921 + ... + 79366321.

It is an arithmetic number, because the mean of its divisors is an integer number (78245517636).

Almost surely, 2^{1222202122021} is an apocalyptic number.

It is an amenable number.

1222202122021 is a deficient number, since it is larger than the sum of its proper divisors (29726160155).

1222202122021 is a wasteful number, since it uses less digits than its factorization.

1222202122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25524.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1222202122021 its reverse (1202212022221), we get a palindrome (2424414144242).

The spelling of 1222202122021 in words is "one trillion, two hundred twenty-two billion, two hundred two million, one hundred twenty-two thousand, twenty-one".