2212251221401 has 4 divisors (see below), whose sum is σ = 2382424392292. Its totient is φ = 2042078050512.

The previous prime is 2212251221393. The next prime is 2212251221443. The reversal of 2212251221401 is 1041221522122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 990176245776 + 1222074975625 = 995076^2 + 1105475^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212251221401 - 2³ = 2212251221393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2212251221101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85086585426 + ... + 85086585451.

It is an arithmetic number, because the mean of its divisors is an integer number (595606098073).

Almost surely, 2^{2212251221401} is an apocalyptic number.

It is an amenable number.

2212251221401 is a deficient number, since it is larger than the sum of its proper divisors (170173170891).

2212251221401 is a wasteful number, since it uses less digits than its factorization.

2212251221401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170173170890.

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 2212251221401 its reverse (1041221522122), we get a palindrome (3253472743523).

The spelling of 2212251221401 in words is "two trillion, two hundred twelve billion, two hundred fifty-one million, two hundred twenty-one thousand, four hundred one".