20312220111031 has 8 divisors (see below), whose sum is σ = 21012717549600. Its totient is φ = 19611727742880.

The previous prime is 20312220111019. The next prime is 20312220111103. The reversal of 20312220111031 is 13011102221302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20312220111031 - 2¹⁷ = 20312219979959 is a prime.

It is a super-2 number, since 2×20312220111031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312220111331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8041401 + ... + 10261021.

It is an arithmetic number, because the mean of its divisors is an integer number (2626589693700).

Almost surely, 2^{20312220111031} is an apocalyptic number.

20312220111031 is a deficient number, since it is larger than the sum of its proper divisors (700497438569).

20312220111031 is a wasteful number, since it uses less digits than its factorization.

20312220111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535209.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20312220111031 its reverse (13011102221302), we get a palindrome (33323322332333).

The spelling of 20312220111031 in words is "twenty trillion, three hundred twelve billion, two hundred twenty million, one hundred eleven thousand, thirty-one".