21210002121203 has 24 divisors (see below), whose sum is σ = 25488519200640. Its totient is φ = 17579899532160.

The previous prime is 21210002121179. The next prime is 21210002121271. The reversal of 21210002121203 is 30212120001212.

It is not a de Polignac number, because 21210002121203 - 2³² = 21205707153907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210002127203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3458276 + ... + 7374257.

It is an arithmetic number, because the mean of its divisors is an integer number (1062021633360).

Almost surely, 2^{21210002121203} is an apocalyptic number.

21210002121203 is a deficient number, since it is larger than the sum of its proper divisors (4278517079437).

21210002121203 is a wasteful number, since it uses less digits than its factorization.

21210002121203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10833867 (or 10833860 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21210002121203 its reverse (30212120001212), we get a palindrome (51422122122415).

The spelling of 21210002121203 in words is "twenty-one trillion, two hundred ten billion, two million, one hundred twenty-one thousand, two hundred three".