111020020121021 has 32 divisors (see below), whose sum is σ = 124478745650688. Its totient is φ = 98143730274240.

The previous prime is 111020020120993. The next prime is 111020020121027. The reversal of 111020020121021 is 120121020020111.

It is a cyclic number.

It is not a de Polignac number, because 111020020121021 - 2¹⁸ = 111020019858877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111020020120987 and 111020020121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020020121027) 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, 149149250 + ... + 149891756.

It is an arithmetic number, because the mean of its divisors is an integer number (3889960801584).

Almost surely, 2^{111020020121021} is an apocalyptic number.

111020020121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111020020121021 is a deficient number, since it is larger than the sum of its proper divisors (13458725529667).

111020020121021 is a wasteful number, since it uses less digits than its factorization.

111020020121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743961.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111020020121021 its reverse (120121020020111), we get a palindrome (231141040141132).

The spelling of 111020020121021 in words is "one hundred eleven trillion, twenty billion, twenty million, one hundred twenty-one thousand, twenty-one".