111112211220220 has 24 divisors (see below), whose sum is σ = 266669306928864. Its totient is φ = 38095615275456.

The previous prime is 111112211220217. The next prime is 111112211220239. The reversal of 111112211220220 is 22022112211111.

It is a happy number.

It is a super-2 number, since 2×111112211220220² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396829325647 + ... + 396829325926.

It is an arithmetic number, because the mean of its divisors is an integer number (11111221122036).

Almost surely, 2^{111112211220220} is an apocalyptic number.

111112211220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111112211220220 is an abundant number, since it is smaller than the sum of its proper divisors (155557095708644).

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

111112211220220 is a wasteful number, since it uses less digits than its factorization.

111112211220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793658651589 (or 793658651587 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111112211220220 its reverse (22022112211111), we get a palindrome (133134323431331).

The spelling of 111112211220220 in words is "one hundred eleven trillion, one hundred twelve billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty".