20132312221 has 16 divisors (see below), whose sum is σ = 23264862208. Its totient is φ = 17064918000.

The previous prime is 20132312219. The next prime is 20132312251. The reversal of 20132312221 is 12221323102.

It is a cyclic number.

It is not a de Polignac number, because 20132312221 - 2¹ = 20132312219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132312251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193006 + ... + 278416.

It is an arithmetic number, because the mean of its divisors is an integer number (1454053888).

Almost surely, 2^20132312221 is an apocalyptic number.

It is an amenable number.

20132312221 is a deficient number, since it is larger than the sum of its proper divisors (3132549987).

20132312221 is a wasteful number, since it uses less digits than its factorization.

20132312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85792.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20132312221 its reverse (12221323102), we get a palindrome (32353635323).

The spelling of 20132312221 in words is "twenty billion, one hundred thirty-two million, three hundred twelve thousand, two hundred twenty-one".