2221132311221 has 4 divisors (see below), whose sum is σ = 2222350707072. Its totient is φ = 2219913915372.

The previous prime is 2221132311163. The next prime is 2221132311337. The reversal of 2221132311221 is 1221132311222.

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 2221132311221 - 2⁶ = 2221132311157 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 (2221132311521) 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, 609195191 + ... + 609198836.

It is an arithmetic number, because the mean of its divisors is an integer number (555587676768).

Almost surely, 2^{2221132311221} is an apocalyptic number.

It is an amenable number.

2221132311221 is a deficient number, since it is larger than the sum of its proper divisors (1218395851).

2221132311221 is a wasteful number, since it uses less digits than its factorization.

2221132311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218395850.

The product of its digits is 576, while the sum is 23.

Adding to 2221132311221 its reverse (1221132311222), we get a palindrome (3442264622443).

Subtracting from 2221132311221 its reverse (1221132311222), we obtain a palindrome (999999999999).

The spelling of 2221132311221 in words is "two trillion, two hundred twenty-one billion, one hundred thirty-two million, three hundred eleven thousand, two hundred twenty-one".