2221402041221 has 4 divisors (see below), whose sum is σ = 2423347681344. Its totient is φ = 2019456401100.

The previous prime is 2221402041197. The next prime is 2221402041263. The reversal of 2221402041221 is 1221402041222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2221402041221 - 2²² = 2221397846917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221402041821) 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, 100972820045 + ... + 100972820066.

It is an arithmetic number, because the mean of its divisors is an integer number (605836920336).

Almost surely, 2^{2221402041221} is an apocalyptic number.

It is an amenable number.

2221402041221 is a deficient number, since it is larger than the sum of its proper divisors (201945640123).

2221402041221 is a wasteful number, since it uses less digits than its factorization.

2221402041221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201945640122.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 2221402041221 its reverse (1221402041222), we get a palindrome (3442804082443).

Subtracting from 2221402041221 its reverse (1221402041222), we obtain a palindrome (999999999999).

The spelling of 2221402041221 in words is "two trillion, two hundred twenty-one billion, four hundred two million, forty-one thousand, two hundred twenty-one".