111010020121 has 32 divisors (see below), whose sum is σ = 153856475136. Its totient is φ = 77271624000.

The previous prime is 111010020097. The next prime is 111010020127. The reversal of 111010020121 is 121020010111.

It is a cyclic number.

It is not a de Polignac number, because 111010020121 - 2¹⁹ = 111009495833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111010020098 and 111010020107.

It is not an unprimeable number, because it can be changed into a prime (111010020127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1757665 + ... + 1819726.

It is an arithmetic number, because the mean of its divisors is an integer number (4808014848).

Almost surely, 2^111010020121 is an apocalyptic number.

111010020121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111010020121 is a deficient number, since it is larger than the sum of its proper divisors (42846455015).

111010020121 is a wasteful number, since it uses less digits than its factorization.

111010020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577453.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111010020121 its reverse (121020010111), we get a palindrome (232030030232).

The spelling of 111010020121 in words is "one hundred eleven billion, ten million, twenty thousand, one hundred twenty-one".