210102112110021 has 32 divisors (see below), whose sum is σ = 296702669088000. Its totient is φ = 132066149598720.

The previous prime is 210102112110001. The next prime is 210102112110047. The reversal of 210102112110021 is 120011211201012.

It is a happy number.

210102112110021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210102112110021 - 2⁶ = 210102112109957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210102112110001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154241841 + ... + 155598038.

It is an arithmetic number, because the mean of its divisors is an integer number (9271958409000).

Almost surely, 2^{210102112110021} is an apocalyptic number.

It is an amenable number.

210102112110021 is a deficient number, since it is larger than the sum of its proper divisors (86600556977979).

210102112110021 is a wasteful number, since it uses less digits than its factorization.

210102112110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309840109.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210102112110021 its reverse (120011211201012), we get a palindrome (330113323311033).

Subtracting from 210102112110021 its reverse (120011211201012), we obtain a palindrome (90090900909009).

The spelling of 210102112110021 in words is "two hundred ten trillion, one hundred two billion, one hundred twelve million, one hundred ten thousand, twenty-one".