20122113311 has 4 divisors (see below), whose sum is σ = 20167950000. Its totient is φ = 20076276624.

The previous prime is 20122113307. The next prime is 20122113353. The reversal of 20122113311 is 11331122102.

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 20122113311 - 2² = 20122113307 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 20122113311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122113911) 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, 22917686 + ... + 22918563.

It is an arithmetic number, because the mean of its divisors is an integer number (5041987500).

Almost surely, 2^20122113311 is an apocalyptic number.

20122113311 is a deficient number, since it is larger than the sum of its proper divisors (45836689).

20122113311 is an equidigital number, since it uses as much as digits as its factorization.

20122113311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45836688.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20122113311 its reverse (11331122102), we get a palindrome (31453235413).

The spelling of 20122113311 in words is "twenty billion, one hundred twenty-two million, one hundred thirteen thousand, three hundred eleven".