210121010002 has 4 divisors (see below), whose sum is σ = 315181515006. Its totient is φ = 105060505000.

The previous prime is 210121009951. The next prime is 210121010017. The reversal of 210121010002 is 200010121012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 181051101001 + 29069909001 = 425501^2 + 170499^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52530252499 + ... + 52530252502.

Almost surely, 2^210121010002 is an apocalyptic number.

210121010002 is a deficient number, since it is larger than the sum of its proper divisors (105060505004).

210121010002 is a wasteful number, since it uses less digits than its factorization.

210121010002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105060505003.

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

Adding to 210121010002 its reverse (200010121012), we get a palindrome (410131131014).

The spelling of 210121010002 in words is "two hundred ten billion, one hundred twenty-one million, ten thousand, two".