1111211102220 has 48 divisors (see below), whose sum is σ = 3113981955168. Its totient is φ = 296076211200.

The previous prime is 1111211102179. The next prime is 1111211102231. The reversal of 1111211102220 is 222011121111.

It is a happy number.

It is a super-2 number, since 2×1111211102220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1111211102220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7638259 + ... + 7782378.

It is an arithmetic number, because the mean of its divisors is an integer number (64874624066).

Almost surely, 2^{1111211102220} is an apocalyptic number.

1111211102220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111211102220 is an abundant number, since it is smaller than the sum of its proper divisors (2002770852948).

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

1111211102220 is a wasteful number, since it uses less digits than its factorization.

1111211102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15421850 (or 15421848 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1111211102220 its reverse (222011121111), we get a palindrome (1333222223331).

The spelling of 1111211102220 in words is "one trillion, one hundred eleven billion, two hundred eleven million, one hundred two thousand, two hundred twenty".