1222021100001 has 16 divisors (see below), whose sum is σ = 1776908322560. Its totient is φ = 742493831040.

The previous prime is 1222021099997. The next prime is 1222021100021. The reversal of 1222021100001 is 1000011202221.

It is not a de Polignac number, because 1222021100001 - 2² = 1222021099997 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 1222021100001.

It is not an unprimeable number, because it can be changed into a prime (1222021100021) 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, 198312580 + ... + 198318741.

It is an arithmetic number, because the mean of its divisors is an integer number (111056770160).

Almost surely, 2^{1222021100001} is an apocalyptic number.

It is an amenable number.

1222021100001 is a deficient number, since it is larger than the sum of its proper divisors (554887222559).

1222021100001 is a wasteful number, since it uses less digits than its factorization.

1222021100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396631416.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1222021100001 its reverse (1000011202221), we get a palindrome (2222032302222).

The spelling of 1222021100001 in words is "one trillion, two hundred twenty-two billion, twenty-one million, one hundred thousand, one".