210000210121 has 8 divisors (see below), whose sum is σ = 226210624640. Its totient is φ = 193797874512.

The previous prime is 210000210029. The next prime is 210000210139. The reversal of 210000210121 is 121012000012.

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 210000210121 - 2²¹ = 209998112969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210000210098 and 210000210107.

It is not an unprimeable number, because it can be changed into a prime (210000210151) 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, 1965681 + ... + 2069758.

It is an arithmetic number, because the mean of its divisors is an integer number (28276328080).

Almost surely, 2^210000210121 is an apocalyptic number.

It is an amenable number.

210000210121 is a deficient number, since it is larger than the sum of its proper divisors (16210414519).

210000210121 is a wasteful number, since it uses less digits than its factorization.

210000210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039455.

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

Adding to 210000210121 its reverse (121012000012), we get a palindrome (331012210133).

The spelling of 210000210121 in words is "two hundred ten billion, two hundred ten thousand, one hundred twenty-one".