111111321220020 has 240 divisors, whose sum is σ = 381693457208448. Its totient is φ = 26833658192640.

The previous prime is 111111321220001. The next prime is 111111321220033. The reversal of 111111321220020 is 20022123111111.

It is a happy number.

111111321220020 is a `hidden beast` number, since 1 + 11 + 111 + 321 + 2 + 200 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111111321219975 and 111111321220002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7167339 + ... + 16540658.

Almost surely, 2^{111111321220020} is an apocalyptic number.

111111321220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111321220020 is an abundant number, since it is smaller than the sum of its proper divisors (270582135988428).

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

111111321220020 is a wasteful number, since it uses less digits than its factorization.

111111321220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23708292 (or 23708281 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 111111321220020 its reverse (20022123111111), we get a palindrome (131133444331131).

The spelling of 111111321220020 in words is "one hundred eleven trillion, one hundred eleven billion, three hundred twenty-one million, two hundred twenty thousand, twenty".