20122011321 has 4 divisors (see below), whose sum is σ = 26829348432. Its totient is φ = 13414674212.

The previous prime is 20122011319. The next prime is 20122011331. The reversal of 20122011321 is 12311022102.

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 20122011321 - 2¹ = 20122011319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20122011321.

It is not an unprimeable number, because it can be changed into a prime (20122011331) 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, 3353668551 + ... + 3353668556.

It is an arithmetic number, because the mean of its divisors is an integer number (6707337108).

Almost surely, 2^20122011321 is an apocalyptic number.

It is an amenable number.

20122011321 is a deficient number, since it is larger than the sum of its proper divisors (6707337111).

20122011321 is an equidigital number, since it uses as much as digits as its factorization.

20122011321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707337110.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20122011321 its reverse (12311022102), we get a palindrome (32433033423).

The spelling of 20122011321 in words is "twenty billion, one hundred twenty-two million, eleven thousand, three hundred twenty-one".