11231211690 has 36 divisors (see below), whose sum is σ = 29203764642. Its totient is φ = 2994721680.

The previous prime is 11231211689. The next prime is 11231211709. The reversal of 11231211690 is 9611213211.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10108090521 + 1123121169 = 100539^2 + 33513^2 .

It is a super-2 number, since 2×11231211690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 999805 + ... + 1010975.

Almost surely, 2^11231211690 is an apocalyptic number.

11231211690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11231211690 is an abundant number, since it is smaller than the sum of its proper divisors (17972552952).

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

11231211690 is an frugal number, since it uses more digits than its factorization.

11231211690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22355 (or 11181 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 11231211690 in words is "eleven billion, two hundred thirty-one million, two hundred eleven thousand, six hundred ninety".