20211310110311 has 4 divisors (see below), whose sum is σ = 20757561734952. Its totient is φ = 19665058485672.

The previous prime is 20211310110253. The next prime is 20211310110317. The reversal of 20211310110311 is 11301101311202.

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 20211310110311 - 2¹⁸ = 20211309848167 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 20211310110311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211310110317) 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, 273125812265 + ... + 273125812338.

It is an arithmetic number, because the mean of its divisors is an integer number (5189390433738).

Almost surely, 2^{20211310110311} is an apocalyptic number.

20211310110311 is a deficient number, since it is larger than the sum of its proper divisors (546251624641).

20211310110311 is an equidigital number, since it uses as much as digits as its factorization.

20211310110311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546251624640.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 20211310110311 its reverse (11301101311202), we get a palindrome (31512411421513).

The spelling of 20211310110311 in words is "twenty trillion, two hundred eleven billion, three hundred ten million, one hundred ten thousand, three hundred eleven".