210101120121 has 4 divisors (see below), whose sum is σ = 280134826832. Its totient is φ = 140067413412.

The previous prime is 210101120111. The next prime is 210101120137. The reversal of 210101120121 is 121021101012.

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 not a de Polignac number, because 210101120121 - 2⁶ = 210101120057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210101120097 and 210101120106.

It is not an unprimeable number, because it can be changed into a prime (210101120111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35016853351 + ... + 35016853356.

It is an arithmetic number, because the mean of its divisors is an integer number (70033706708).

Almost surely, 2^210101120121 is an apocalyptic number.

It is an amenable number.

210101120121 is a deficient number, since it is larger than the sum of its proper divisors (70033706711).

210101120121 is an equidigital number, since it uses as much as digits as its factorization.

210101120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70033706710.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210101120121 its reverse (121021101012), we get a palindrome (331122221133).

The spelling of 210101120121 in words is "two hundred ten billion, one hundred one million, one hundred twenty thousand, one hundred twenty-one".