2211223231031 has 2 divisors, whose sum is σ = 2211223231032. Its totient is φ = 2211223231030.

The previous prime is 2211223230913. The next prime is 2211223231033. The reversal of 2211223231031 is 1301323221122.

2211223231031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2211223231031 - 2²⁶ = 2211156122167 is a prime.

It is a super-2 number, since 2×2211223231031² (a number of 25 digits) contains 22 as substring.

Together with 2211223231033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2211223230988 and 2211223231006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211223231033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105611615515 + 1105611615516.

It is an arithmetic number, because the mean of its divisors is an integer number (1105611615516).

Almost surely, 2^{2211223231031} is an apocalyptic number.

2211223231031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211223231031 is an equidigital number, since it uses as much as digits as its factorization.

2211223231031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2211223231031 its reverse (1301323221122), we get a palindrome (3512546452153).

Subtracting from 2211223231031 its reverse (1301323221122), we obtain a palindrome (909900009909).

The spelling of 2211223231031 in words is "two trillion, two hundred eleven billion, two hundred twenty-three million, two hundred thirty-one thousand, thirty-one".