210121010018 has 8 divisors (see below), whose sum is σ = 318241530048. Its totient is φ = 104040500004.

The previous prime is 210121010017. The next prime is 210121010023. The reversal of 210121010018 is 810010121012.

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

It is a junction number, because it is equal to n+sod(n) for n = 210121009978 and 210121010005.

It is not an unprimeable number, because it can be changed into a prime (210121010017) 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, 510002246 + ... + 510002657.

It is an arithmetic number, because the mean of its divisors is an integer number (39780191256).

Almost surely, 2^210121010018 is an apocalyptic number.

210121010018 is a deficient number, since it is larger than the sum of its proper divisors (108120520030).

210121010018 is a wasteful number, since it uses less digits than its factorization.

210121010018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020005008.

The product of its (nonzero) digits is 32, while the sum is 17.

The spelling of 210121010018 in words is "two hundred ten billion, one hundred twenty-one million, ten thousand, eighteen".