111021110232020 has 48 divisors (see below), whose sum is σ = 247474311972048. Its totient is φ = 41691952742400.

The previous prime is 111021110231987. The next prime is 111021110232047. The reversal of 111021110232020 is 20232011120111.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 43929350038084 + 67091760193936 = 6627922^2 + 8190956^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 111021110232020.

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, 407011637 + ... + 407284316.

It is an arithmetic number, because the mean of its divisors is an integer number (5155714832751).

Almost surely, 2^{111021110232020} is an apocalyptic number.

111021110232020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021110232020 is an abundant number, since it is smaller than the sum of its proper divisors (136453201740028).

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

111021110232020 is a wasteful number, since it uses less digits than its factorization.

111021110232020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814296380 (or 814296378 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111021110232020 its reverse (20232011120111), we get a palindrome (131253121352131).

The spelling of 111021110232020 in words is "one hundred eleven trillion, twenty-one billion, one hundred ten million, two hundred thirty-two thousand, twenty".