111010201021021 has 4 divisors (see below), whose sum is σ = 111010931940700. Its totient is φ = 111009470101344.

The previous prime is 111010201021007. The next prime is 111010201021051. The reversal of 111010201021021 is 120120102010111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99416952348025 + 11593248672996 = 9970805^2 + 3404886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111010201021021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111010201020992 and 111010201021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111010201021051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365231976 + ... + 365535793.

It is an arithmetic number, because the mean of its divisors is an integer number (27752732985175).

Almost surely, 2^{111010201021021} is an apocalyptic number.

It is an amenable number.

111010201021021 is a deficient number, since it is larger than the sum of its proper divisors (730919679).

111010201021021 is an equidigital number, since it uses as much as digits as its factorization.

111010201021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730919678.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111010201021021 its reverse (120120102010111), we get a palindrome (231130303031132).

The spelling of 111010201021021 in words is "one hundred eleven trillion, ten billion, two hundred one million, twenty-one thousand, twenty-one".