210120121 has 8 divisors (see below), whose sum is σ = 216050688. Its totient is φ = 204228000.

The previous prime is 210120101. The next prime is 210120133. The reversal of 210120121 is 121021012.

210120121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210120121 - 2¹³ = 210111929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210120098 and 210120107.

It is not an unprimeable number, because it can be changed into a prime (210120101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1656 + ... + 20566.

It is an arithmetic number, because the mean of its divisors is an integer number (27006336).

Almost surely, 2^210120121 is an apocalyptic number.

It is an amenable number.

210120121 is a deficient number, since it is larger than the sum of its proper divisors (5930567).

210120121 is a wasteful number, since it uses less digits than its factorization.

210120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19223.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 210120121 is about 14495.5207219334. The cubic root of 210120121 is about 594.5055053965.

Adding to 210120121 its reverse (121021012), we get a palindrome (331141133).

It can be divided in two parts, 2101 and 20121, that added together give a palindrome (22222).

The spelling of 210120121 in words is "two hundred ten million, one hundred twenty thousand, one hundred twenty-one".