1111100211220 has 24 divisors (see below), whose sum is σ = 2338625520000. Its totient is φ = 443427688992.

The previous prime is 1111100211197. The next prime is 1111100211229. The reversal of 1111100211220 is 221120011111.

It is a happy number.

It is a super-2 number, since 2×1111100211220² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1111100211220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111100211229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63265720 + ... + 63283279.

It is an arithmetic number, because the mean of its divisors is an integer number (97442730000).

Almost surely, 2^{1111100211220} is an apocalyptic number.

1111100211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111100211220 is an abundant number, since it is smaller than the sum of its proper divisors (1227525308780).

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

1111100211220 is a wasteful number, since it uses less digits than its factorization.

1111100211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126549447 (or 126549445 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1111100211220 its reverse (221120011111), we get a palindrome (1332220222331).

The spelling of 1111100211220 in words is "one trillion, one hundred eleven billion, one hundred million, two hundred eleven thousand, two hundred twenty".