20012122311 has 4 divisors (see below), whose sum is σ = 26682829752. Its totient is φ = 13341414872.

The previous prime is 20012122303. The next prime is 20012122337. The reversal of 20012122311 is 11322121002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20012122311 - 2³ = 20012122303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012122111) 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, 3335353716 + ... + 3335353721.

It is an arithmetic number, because the mean of its divisors is an integer number (6670707438).

Almost surely, 2^20012122311 is an apocalyptic number.

20012122311 is a deficient number, since it is larger than the sum of its proper divisors (6670707441).

20012122311 is an equidigital number, since it uses as much as digits as its factorization.

20012122311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670707440.

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

Adding to 20012122311 its reverse (11322121002), we get a palindrome (31334243313).

The spelling of 20012122311 in words is "twenty billion, twelve million, one hundred twenty-two thousand, three hundred eleven".