2044221402121 has 4 divisors (see below), whose sum is σ = 2044309580100. Its totient is φ = 2044133224144.

The previous prime is 2044221402079. The next prime is 2044221402127. The reversal of 2044221402121 is 1212041224402.

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 1416252324096 + 627969078025 = 1190064^2 + 792445^2 .

It is a cyclic number.

It is not a de Polignac number, because 2044221402121 - 2⁹ = 2044221401609 is a prime.

It is a super-2 number, since 2×2044221402121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2044221402127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44054206 + ... + 44100583.

It is an arithmetic number, because the mean of its divisors is an integer number (511077395025).

Almost surely, 2^{2044221402121} is an apocalyptic number.

It is an amenable number.

2044221402121 is a deficient number, since it is larger than the sum of its proper divisors (88177979).

2044221402121 is an equidigital number, since it uses as much as digits as its factorization.

2044221402121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88177978.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 2044221402121 its reverse (1212041224402), we get a palindrome (3256262626523).

The spelling of 2044221402121 in words is "two trillion, forty-four billion, two hundred twenty-one million, four hundred two thousand, one hundred twenty-one".