210121102010 has 8 divisors (see below), whose sum is σ = 378217983636. Its totient is φ = 84048440800.

The previous prime is 210121102003. The next prime is 210121102013. The reversal of 210121102010 is 10201121012.

It can be written as a sum of positive squares in 2 ways, for example, as 209574430849 + 546671161 = 457793^2 + 23381^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210121101982 and 210121102000.

It is not an unprimeable number, because it can be changed into a prime (210121102013) 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, 10506055091 + ... + 10506055110.

Almost surely, 2^210121102010 is an apocalyptic number.

210121102010 is a deficient number, since it is larger than the sum of its proper divisors (168096881626).

210121102010 is a wasteful number, since it uses less digits than its factorization.

210121102010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21012110208.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210121102010 its reverse (10201121012), we get a palindrome (220322223022).

The spelling of 210121102010 in words is "two hundred ten billion, one hundred twenty-one million, one hundred two thousand, ten".