1111010211220 has 144 divisors (see below), whose sum is σ = 2923704177408. Its totient is φ = 351509034240.

The previous prime is 1111010211203. The next prime is 1111010211287. The reversal of 1111010211220 is 221120101111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 1111010211220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48693615 + ... + 48716425.

It is an arithmetic number, because the mean of its divisors is an integer number (20303501232).

Almost surely, 2^{1111010211220} is an apocalyptic number.

1111010211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111010211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1461852088704).

1111010211220 is an abundant number, since it is smaller than the sum of its proper divisors (1812693966188).

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

1111010211220 is a wasteful number, since it uses less digits than its factorization.

1111010211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26670 (or 26661 counting only the distinct ones).

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

Adding to 1111010211220 its reverse (221120101111), we get a palindrome (1332130312331).

The spelling of 1111010211220 in words is "one trillion, one hundred eleven billion, ten million, two hundred eleven thousand, two hundred twenty".