111001222021020 has 48 divisors (see below), whose sum is σ = 311166086239008. Its totient is φ = 29565786388480.

The previous prime is 111001222020977. The next prime is 111001222021069. The reversal of 111001222021020 is 20120222100111.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 1079307021 + ... + 1079409860.

It is an arithmetic number, because the mean of its divisors is an integer number (6482626796646).

Almost surely, 2^{111001222021020} is an apocalyptic number.

111001222021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111001222021020 is an abundant number, since it is smaller than the sum of its proper divisors (200164864217988).

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

111001222021020 is a wasteful number, since it uses less digits than its factorization.

111001222021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158717750 (or 2158717748 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111001222021020 its reverse (20120222100111), we get a palindrome (131121444121131).

The spelling of 111001222021020 in words is "one hundred eleven trillion, one billion, two hundred twenty-two million, twenty-one thousand, twenty".