2201220443421 has 6 divisors (see below), whose sum is σ = 3179540640510. Its totient is φ = 1467480295608.

The previous prime is 2201220443371. The next prime is 2201220443437. The reversal of 2201220443421 is 1243440221022.

It is a happy number.

2201220443421 is a `hidden beast` number, since 2 + 2 + 0 + 1 + 2 + 204 + 434 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1784324237796 + 416896205625 = 1335786^2 + 645675^2 .

It is not a de Polignac number, because 2201220443421 - 2¹⁹ = 2201219919133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201220443491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122290024626 + ... + 122290024643.

It is an arithmetic number, because the mean of its divisors is an integer number (529923440085).

Almost surely, 2^{2201220443421} is an apocalyptic number.

It is an amenable number.

2201220443421 is a deficient number, since it is larger than the sum of its proper divisors (978320197089).

2201220443421 is a wasteful number, since it uses less digits than its factorization.

2201220443421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244580049275 (or 244580049272 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 2201220443421 its reverse (1243440221022), we get a palindrome (3444660664443).

The spelling of 2201220443421 in words is "two trillion, two hundred one billion, two hundred twenty million, four hundred forty-three thousand, four hundred twenty-one".