11211111992 has 16 divisors (see below), whose sum is σ = 22257354960. Its totient is φ = 5275817344.

The previous prime is 11211111991. The next prime is 11211111997. The reversal of 11211111992 is 29911111211.

It is a super-3 number, since 3×11211111992³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211111991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41217188 + ... + 41217459.

It is an arithmetic number, because the mean of its divisors is an integer number (1391084685).

Almost surely, 2^11211111992 is an apocalyptic number.

It is an amenable number.

11211111992 is a deficient number, since it is larger than the sum of its proper divisors (11046242968).

11211111992 is a wasteful number, since it uses less digits than its factorization.

11211111992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82434670 (or 82434666 counting only the distinct ones).

The product of its digits is 324, while the sum is 29.

It can be divided in two parts, 112111119 and 92, that added together give a palindrome (112111211).

The spelling of 11211111992 in words is "eleven billion, two hundred eleven million, one hundred eleven thousand, nine hundred ninety-two".