2211320312031 has 4 divisors (see below), whose sum is σ = 2948427082712. Its totient is φ = 1474213541352.

The previous prime is 2211320312017. The next prime is 2211320312063. The reversal of 2211320312031 is 1302130231122.

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

It is not a de Polignac number, because 2211320312031 - 2⁵ = 2211320311999 is a prime.

It is a super-2 number, since 2×2211320312031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211320311989 and 2211320312007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211320312081) 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, 368553385336 + ... + 368553385341.

It is an arithmetic number, because the mean of its divisors is an integer number (737106770678).

Almost surely, 2^{2211320312031} is an apocalyptic number.

2211320312031 is a deficient number, since it is larger than the sum of its proper divisors (737106770681).

2211320312031 is an equidigital number, since it uses as much as digits as its factorization.

2211320312031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737106770680.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 2211320312031 its reverse (1302130231122), we get a palindrome (3513450543153).

The spelling of 2211320312031 in words is "two trillion, two hundred eleven billion, three hundred twenty million, three hundred twelve thousand, thirty-one".