22111231021031 has 2 divisors, whose sum is σ = 22111231021032. Its totient is φ = 22111231021030.

The previous prime is 22111231021027. The next prime is 22111231021127. The reversal of 22111231021031 is 13012013211122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22111231021031 - 2² = 22111231021027 is a prime.

It is a super-2 number, since 2×22111231021031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22111231020994 and 22111231021012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22111231011031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055615510515 + 11055615510516.

It is an arithmetic number, because the mean of its divisors is an integer number (11055615510516).

Almost surely, 2^{22111231021031} is an apocalyptic number.

22111231021031 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111231021031 is an equidigital number, since it uses as much as digits as its factorization.

22111231021031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 22111231021031 its reverse (13012013211122), we get a palindrome (35123244232153).

The spelling of 22111231021031 in words is "twenty-two trillion, one hundred eleven billion, two hundred thirty-one million, twenty-one thousand, thirty-one".