11431311102 has 24 divisors (see below), whose sum is σ = 24823767384. Its totient is φ = 3801832944.

The previous prime is 11431311091. The next prime is 11431311103. The reversal of 11431311102 is 20111313411.

It is a happy number.

It is a super-4 number, since 4×11431311102⁴ (a number of 41 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431311103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 708813 + ... + 724760.

It is an arithmetic number, because the mean of its divisors is an integer number (1034323641).

Almost surely, 2^11431311102 is an apocalyptic number.

11431311102 is an abundant number, since it is smaller than the sum of its proper divisors (13392456282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11431311102 is a wasteful number, since it uses less digits than its factorization.

11431311102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434024 (or 1434021 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 11431311102 its reverse (20111313411), we get a palindrome (31542624513).

The spelling of 11431311102 in words is "eleven billion, four hundred thirty-one million, three hundred eleven thousand, one hundred two".