2021122211201 has 2 divisors, whose sum is σ = 2021122211202. Its totient is φ = 2021122211200.

The previous prime is 2021122211197. The next prime is 2021122211239. The reversal of 2021122211201 is 1021122211202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1140154128400 + 880968082801 = 1067780^2 + 938599^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021122211201 - 2² = 2021122211197 is a prime.

It is a super-2 number, since 2×2021122211201² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2021122211201.

It is not a weakly prime, because it can be changed into another prime (2021122211291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010561105600 + 1010561105601.

It is an arithmetic number, because the mean of its divisors is an integer number (1010561105601).

Almost surely, 2^{2021122211201} is an apocalyptic number.

It is an amenable number.

2021122211201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021122211201 is an equidigital number, since it uses as much as digits as its factorization.

2021122211201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2021122211201 its reverse (1021122211202), we get a palindrome (3042244422403).

Subtracting from 2021122211201 its reverse (1021122211202), we obtain a palindrome (999999999999).

The spelling of 2021122211201 in words is "two trillion, twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, two hundred one".