1111221021312 has 96 divisors (see below), whose sum is σ = 3284077454580. Its totient is φ = 360395993088.

The previous prime is 1111221021269. The next prime is 1111221021331. The reversal of 1111221021312 is 2131201221111.

It is a happy number.

1111221021312 is a `hidden beast` number, since 1 + 111 + 221 + 0 + 21 + 312 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1102046446656 + 9174574656 = 1049784^2 + 95784^2 .

It is a tau number, because it is divible by the number of its divisors (96).

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

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, 12992533 + ... + 13077780.

Almost surely, 2^{1111221021312} is an apocalyptic number.

1111221021312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1111221021312 is an abundant number, since it is smaller than the sum of its proper divisors (2172856433268).

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

1111221021312 is a wasteful number, since it uses less digits than its factorization.

1111221021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26070370 (or 26070355 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1111221021312 its reverse (2131201221111), we get a palindrome (3242422242423).

The spelling of 1111221021312 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, twenty-one thousand, three hundred twelve".