111121200222020 has 24 divisors (see below), whose sum is σ = 233356885335000. Its totient is φ = 44448029637632.

The previous prime is 111121200221981. The next prime is 111121200222023. The reversal of 111121200222020 is 20222002121111.

It can be written as a sum of positive squares in 4 ways, for example, as 35595089010244 + 75526111211776 = 5966162^2 + 8690576^2 .

It is a super-2 number, since 2×111121200222020² (a number of 29 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 111121200222020.

It is not an unprimeable number, because it can be changed into a prime (111121200222023) 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, 26126795 + ... + 30080754.

It is an arithmetic number, because the mean of its divisors is an integer number (9723203555625).

Almost surely, 2^{111121200222020} is an apocalyptic number.

111121200222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121200222020 is an abundant number, since it is smaller than the sum of its proper divisors (122235685112980).

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

111121200222020 is a wasteful number, since it uses less digits than its factorization.

111121200222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56306407 (or 56306405 counting only the distinct ones).

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

Adding to 111121200222020 its reverse (20222002121111), we get a palindrome (131343202343131).

The spelling of 111121200222020 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred million, two hundred twenty-two thousand, twenty".