1111221301212 has 72 divisors (see below), whose sum is σ = 3073534918272. Its totient is φ = 335716365600.

The previous prime is 1111221301199. The next prime is 1111221301277. The reversal of 1111221301212 is 2121031221111.

It is a happy number.

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

It is a congruent number.

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, 4107768 + ... + 4369919.

It is an arithmetic number, because the mean of its divisors is an integer number (42687984976).

Almost surely, 2^{1111221301212} is an apocalyptic number.

1111221301212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1111221301212 is an abundant number, since it is smaller than the sum of its proper divisors (1962313617060).

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

1111221301212 is a wasteful number, since it uses less digits than its factorization.

1111221301212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8478039 (or 8478034 counting only the distinct ones).

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

Adding to 1111221301212 its reverse (2121031221111), we get a palindrome (3232252522323).

The spelling of 1111221301212 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, three hundred one thousand, two hundred twelve".