121110200221 has 4 divisors (see below), whose sum is σ = 121116176892. Its totient is φ = 121104223552.

The previous prime is 121110200209. The next prime is 121110200227. The reversal of 121110200221 is 122002011121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122002011121 = 4561 ⋅26748961.

It can be written as a sum of positive squares in 2 ways, for example, as 97181204121 + 23928996100 = 311739^2 + 154690^2 .

It is a cyclic number.

It is not a de Polignac number, because 121110200221 - 2²³ = 121101811613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110200227) 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, 2957836 + ... + 2998501.

It is an arithmetic number, because the mean of its divisors is an integer number (30279044223).

Almost surely, 2^121110200221 is an apocalyptic number.

It is an amenable number.

121110200221 is a deficient number, since it is larger than the sum of its proper divisors (5976671).

121110200221 is an equidigital number, since it uses as much as digits as its factorization.

121110200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5976670.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121110200221 its reverse (122002011121), we get a palindrome (243112211342).

The spelling of 121110200221 in words is "one hundred twenty-one billion, one hundred ten million, two hundred thousand, two hundred twenty-one".