11431311202 has 24 divisors (see below), whose sum is σ = 18159037596. Its totient is φ = 5396251104.

The previous prime is 11431311187. The next prime is 11431311217. The reversal of 11431311202 is 20211313411.

It is an interprime number because it is at equal distance from previous prime (11431311187) and next prime (11431311217).

It can be written as a sum of positive squares in 2 ways, for example, as 8244821601 + 3186489601 = 90801^2 + 56449^2 .

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 11431311202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184528 + ... + 238564.

Almost surely, 2^11431311202 is an apocalyptic number.

11431311202 is a deficient number, since it is larger than the sum of its proper divisors (6727726394).

11431311202 is a wasteful number, since it uses less digits than its factorization.

11431311202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54370 (or 54351 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11431311202 its reverse (20211313411), we get a palindrome (31642624613).

The spelling of 11431311202 in words is "eleven billion, four hundred thirty-one million, three hundred eleven thousand, two hundred two".