111121220111020 has 96 divisors (see below), whose sum is σ = 267379887906432. Its totient is φ = 38000293613568.

The previous prime is 111121220111017. The next prime is 111121220111021. The reversal of 111121220111020 is 20111022121111.

It is a super-2 number, since 2×111121220111020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111121220110985 and 111121220111003.

It is not an unprimeable number, because it can be changed into a prime (111121220111021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1005776022 + ... + 1005886498.

It is an arithmetic number, because the mean of its divisors is an integer number (2785207165692).

Almost surely, 2^{111121220111020} is an apocalyptic number.

111121220111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121220111020 is an abundant number, since it is smaller than the sum of its proper divisors (156258667795412).

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

111121220111020 is a wasteful number, since it uses less digits than its factorization.

111121220111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128987 (or 128985 counting only the distinct ones).

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

Adding to 111121220111020 its reverse (20111022121111), we get a palindrome (131232242232131).

The spelling of 111121220111020 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, twenty".