111210220200121 has 4 divisors (see below), whose sum is σ = 127097394514432. Its totient is φ = 95323045885812.

The previous prime is 111210220200061. The next prime is 111210220200133. The reversal of 111210220200121 is 121002022012111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111210220200121 - 2³⁹ = 110660464386233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111210220200095 and 111210220200104.

It is not an unprimeable number, because it can be changed into a prime (111210220204121) 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, 7943587157145 + ... + 7943587157158.

It is an arithmetic number, because the mean of its divisors is an integer number (31774348628608).

Almost surely, 2^{111210220200121} is an apocalyptic number.

It is an amenable number.

111210220200121 is a deficient number, since it is larger than the sum of its proper divisors (15887174314311).

111210220200121 is an equidigital number, since it uses as much as digits as its factorization.

111210220200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15887174314310.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111210220200121 its reverse (121002022012111), we get a palindrome (232212242212232).

The spelling of 111210220200121 in words is "one hundred eleven trillion, two hundred ten billion, two hundred twenty million, two hundred thousand, one hundred twenty-one".