1111212220000 has 60 divisors (see below), whose sum is σ = 2733748792236. Its totient is φ = 444484880000.

The previous prime is 1111212219991. The next prime is 1111212220003. The reversal of 1111212220000 is 222121111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111212220003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27760306 + ... + 27800305.

Almost surely, 2^{1111212220000} is an apocalyptic number.

1111212220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111212220000 is an abundant number, since it is smaller than the sum of its proper divisors (1622536572236).

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

1111212220000 is an frugal number, since it uses more digits than its factorization.

1111212220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55560641 (or 55560618 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1111212220000 its reverse (222121111), we get a palindrome (1111434341111).

The spelling of 1111212220000 in words is "one trillion, one hundred eleven billion, two hundred twelve million, two hundred twenty thousand".