11213123031 has 32 divisors (see below), whose sum is σ = 18151242240. Its totient is φ = 6784948800.

The previous prime is 11213123017. The next prime is 11213123059. The reversal of 11213123031 is 13032131211.

It is not a de Polignac number, because 11213123031 - 2⁶ = 11213122967 is a prime.

It is a super-2 number, since 2×11213123031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11213122995 and 11213123013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213123071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157491 + ... + 217323.

It is an arithmetic number, because the mean of its divisors is an integer number (567226320).

Almost surely, 2^11213123031 is an apocalyptic number.

11213123031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11213123031 is a deficient number, since it is larger than the sum of its proper divisors (6938119209).

11213123031 is a wasteful number, since it uses less digits than its factorization.

11213123031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60484 (or 60478 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11213123031 its reverse (13032131211), we get a palindrome (24245254242).

The spelling of 11213123031 in words is "eleven billion, two hundred thirteen million, one hundred twenty-three thousand, thirty-one".