111101021121020 has 36 divisors (see below), whose sum is σ = 271403923026600. Its totient is φ = 38091778669728.

The previous prime is 111101021120899. The next prime is 111101021121031. The reversal of 111101021121020 is 20121120101111.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 111101021120986 and 111101021121004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56684193470 + ... + 56684195429.

It is an arithmetic number, because the mean of its divisors is an integer number (7538997861850).

Almost surely, 2^{111101021121020} is an apocalyptic number.

111101021121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111101021121020 is an abundant number, since it is smaller than the sum of its proper divisors (160302901905580).

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

111101021121020 is a wasteful number, since it uses less digits than its factorization.

111101021121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113368388922 (or 113368388913 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111101021121020 its reverse (20121120101111), we get a palindrome (131222141222131).

The spelling of 111101021121020 in words is "one hundred eleven trillion, one hundred one billion, twenty-one million, one hundred twenty-one thousand, twenty".