20212023311 has 4 divisors (see below), whose sum is σ = 20267097312. Its totient is φ = 20156949312.

The previous prime is 20212023289. The next prime is 20212023323. The reversal of 20212023311 is 11332021202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212023311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212023311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212023331) 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, 27536450 + ... + 27537183.

It is an arithmetic number, because the mean of its divisors is an integer number (5066774328).

Almost surely, 2^20212023311 is an apocalyptic number.

20212023311 is a deficient number, since it is larger than the sum of its proper divisors (55074001).

20212023311 is an equidigital number, since it uses as much as digits as its factorization.

20212023311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55074000.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20212023311 its reverse (11332021202), we get a palindrome (31544044513).

The spelling of 20212023311 in words is "twenty billion, two hundred twelve million, twenty-three thousand, three hundred eleven".