20312221211113 has 4 divisors (see below), whose sum is σ = 21874699765828. Its totient is φ = 18749742656400.

The previous prime is 20312221211069. The next prime is 20312221211137. The reversal of 20312221211113 is 31111212221302.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1062565132864 + 19249656078249 = 1030808^2 + 4387443^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312221211113 - 2¹³ = 20312221202921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20312221211413) 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, 781239277338 + ... + 781239277363.

It is an arithmetic number, because the mean of its divisors is an integer number (5468674941457).

Almost surely, 2^{20312221211113} is an apocalyptic number.

It is an amenable number.

20312221211113 is a deficient number, since it is larger than the sum of its proper divisors (1562478554715).

20312221211113 is a wasteful number, since it uses less digits than its factorization.

20312221211113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562478554714.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 20312221211113 its reverse (31111212221302), we get a palindrome (51423433432415).

The spelling of 20312221211113 in words is "twenty trillion, three hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, one hundred thirteen".