21210102120010 has 8 divisors (see below), whose sum is σ = 38178183816036. Its totient is φ = 8484040848000.

The previous prime is 21210102119813. The next prime is 21210102120013. The reversal of 21210102120010 is 1002120101212.

It can be written as a sum of positive squares in 2 ways, for example, as 21019813359169 + 190288760841 = 4584737^2 + 436221^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21210102120013) 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, 1060505105991 + ... + 1060505106010.

Almost surely, 2^{21210102120010} is an apocalyptic number.

21210102120010 is a deficient number, since it is larger than the sum of its proper divisors (16968081696026).

21210102120010 is a wasteful number, since it uses less digits than its factorization.

21210102120010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121010212008.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21210102120010 its reverse (1002120101212), we get a palindrome (22212222221222).

The spelling of 21210102120010 in words is "twenty-one trillion, two hundred ten billion, one hundred two million, one hundred twenty thousand, ten".