11213311031 has 16 divisors (see below), whose sum is σ = 12573236928. Its totient is φ = 9932716800.

The previous prime is 11213311009. The next prime is 11213311037. The reversal of 11213311031 is 13011331211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11213311031 is a prime.

It is a super-2 number, since 2×11213311031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213311037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139931 + ... + 204956.

It is an arithmetic number, because the mean of its divisors is an integer number (785827308).

Almost surely, 2^11213311031 is an apocalyptic number.

11213311031 is a deficient number, since it is larger than the sum of its proper divisors (1359925897).

11213311031 is a wasteful number, since it uses less digits than its factorization.

11213311031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345002.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 11213311031 its reverse (13011331211), we get a palindrome (24224642242).

The spelling of 11213311031 in words is "eleven billion, two hundred thirteen million, three hundred eleven thousand, thirty-one".