20212312311 has 6 divisors (see below), whose sum is σ = 29195562240. Its totient is φ = 13474874868.

The previous prime is 20212312279. The next prime is 20212312313. The reversal of 20212312311 is 11321321202.

20212312311 is a `hidden beast` number, since 20 + 21 + 2 + 312 + 311 = 666.

It is not a de Polignac number, because 20212312311 - 2⁵ = 20212312279 is a prime.

It is a super-3 number, since 3×20212312311³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212312313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122906231 + ... + 1122906248.

It is an arithmetic number, because the mean of its divisors is an integer number (4865927040).

Almost surely, 2^20212312311 is an apocalyptic number.

20212312311 is a deficient number, since it is larger than the sum of its proper divisors (8983249929).

20212312311 is a wasteful number, since it uses less digits than its factorization.

20212312311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245812485 (or 2245812482 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20212312311 its reverse (11321321202), we get a palindrome (31533633513).

The spelling of 20212312311 in words is "twenty billion, two hundred twelve million, three hundred twelve thousand, three hundred eleven".