1111221001100 has 72 divisors (see below), whose sum is σ = 2756913650400. Its totient is φ = 380839979520.

The previous prime is 1111221001061. The next prime is 1111221001243. The reversal of 1111221001100 is 11001221111.

It is a super-2 number, since 2×1111221001100² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1472912 + ... + 2095688.

Almost surely, 2^{1111221001100} is an apocalyptic number.

1111221001100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111221001100 is an abundant number, since it is smaller than the sum of its proper divisors (1645692649300).

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

1111221001100 is a wasteful number, since it uses less digits than its factorization.

1111221001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625347 (or 625340 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1111221001100 its reverse (11001221111), we get a palindrome (1122222222211).

The spelling of 1111221001100 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one thousand, one hundred".