20002120311 has 4 divisors (see below), whose sum is σ = 26669493752. Its totient is φ = 13334746872.

The previous prime is 20002120309. The next prime is 20002120337. The reversal of 20002120311 is 11302120002.

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

It is not a de Polignac number, because 20002120311 - 2¹ = 20002120309 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 (20002120511) 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, 3333686716 + ... + 3333686721.

It is an arithmetic number, because the mean of its divisors is an integer number (6667373438).

Almost surely, 2^20002120311 is an apocalyptic number.

20002120311 is a deficient number, since it is larger than the sum of its proper divisors (6667373441).

20002120311 is an equidigital number, since it uses as much as digits as its factorization.

20002120311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667373440.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20002120311 its reverse (11302120002), we get a palindrome (31304240313).

The spelling of 20002120311 in words is "twenty billion, two million, one hundred twenty thousand, three hundred eleven".