120121010101 has 4 divisors (see below), whose sum is σ = 120140080204. Its totient is φ = 120101940000.

The previous prime is 120121010089. The next prime is 120121010117. The reversal of 120121010101 is 101010121021.

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 76073914225 + 44047095876 = 275815^2 + 209874^2 .

It is a cyclic number.

It is not a de Polignac number, because 120121010101 - 2⁵ = 120121010069 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 (120121010161) 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, 9525600 + ... + 9538201.

It is an arithmetic number, because the mean of its divisors is an integer number (30035020051).

Almost surely, 2^120121010101 is an apocalyptic number.

It is an amenable number.

120121010101 is a deficient number, since it is larger than the sum of its proper divisors (19070103).

120121010101 is an equidigital number, since it uses as much as digits as its factorization.

120121010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19070102.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 120121010101 its reverse (101010121021), we get a palindrome (221131131122).

The spelling of 120121010101 in words is "one hundred twenty billion, one hundred twenty-one million, ten thousand, one hundred one".