201120120121 has 4 divisors (see below), whose sum is σ = 202567027600. Its totient is φ = 199673212644.

The previous prime is 201120120031. The next prime is 201120120133. The reversal of 201120120121 is 121021021102.

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 a de Polignac number, because none of the positive numbers 2^k-201120120121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201120120221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723453531 + ... + 723453808.

It is an arithmetic number, because the mean of its divisors is an integer number (50641756900).

Almost surely, 2^201120120121 is an apocalyptic number.

It is an amenable number.

201120120121 is a deficient number, since it is larger than the sum of its proper divisors (1446907479).

201120120121 is a wasteful number, since it uses less digits than its factorization.

201120120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446907478.

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

Adding to 201120120121 its reverse (121021021102), we get a palindrome (322141141223).

The spelling of 201120120121 in words is "two hundred one billion, one hundred twenty million, one hundred twenty thousand, one hundred twenty-one".