111121202220020 has 48 divisors (see below), whose sum is σ = 247086054911808. Its totient is φ = 41833052766720.

The previous prime is 111121202220001. The next prime is 111121202220043. The reversal of 111121202220020 is 20022202121111.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14525819 + ... + 20814461.

It is an arithmetic number, because the mean of its divisors is an integer number (5147626143996).

Almost surely, 2^{111121202220020} is an apocalyptic number.

111121202220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121202220020 is an abundant number, since it is smaller than the sum of its proper divisors (135964852691788).

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

111121202220020 is a wasteful number, since it uses less digits than its factorization.

111121202220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6340640 (or 6340638 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111121202220020 its reverse (20022202121111), we get a palindrome (131143404341131).

The spelling of 111121202220020 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred two million, two hundred twenty thousand, twenty".