11111202123031 has 2 divisors, whose sum is σ = 11111202123032. Its totient is φ = 11111202123030.

The previous prime is 11111202122921. The next prime is 11111202123059. The reversal of 11111202123031 is 13032120211111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11111202123031 - 2⁹ = 11111202122519 is a prime.

It is a super-2 number, since 2×11111202123031² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111202123731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555601061515 + 5555601061516.

It is an arithmetic number, because the mean of its divisors is an integer number (5555601061516).

Almost surely, 2^{11111202123031} is an apocalyptic number.

11111202123031 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111202123031 is an equidigital number, since it uses as much as digits as its factorization.

11111202123031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 11111202123031 its reverse (13032120211111), we get a palindrome (24143322334142).

The spelling of 11111202123031 in words is "eleven trillion, one hundred eleven billion, two hundred two million, one hundred twenty-three thousand, thirty-one".