1222111200021 has 16 divisors (see below), whose sum is σ = 1673644042944. Its totient is φ = 792662799744.

The previous prime is 1222111200007. The next prime is 1222111200043. The reversal of 1222111200021 is 1200021112221.

It is not a de Polignac number, because 1222111200021 - 2³⁵ = 1187751461653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222111200061) 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, 1148670 + ... + 1940016.

It is an arithmetic number, because the mean of its divisors is an integer number (104602752684).

Almost surely, 2^{1222111200021} is an apocalyptic number.

It is an amenable number.

1222111200021 is a deficient number, since it is larger than the sum of its proper divisors (451532842923).

1222111200021 is a wasteful number, since it uses less digits than its factorization.

1222111200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805300.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1222111200021 its reverse (1200021112221), we get a palindrome (2422132312242).

The spelling of 1222111200021 in words is "one trillion, two hundred twenty-two billion, one hundred eleven million, two hundred thousand, twenty-one".