21010101200110 has 16 divisors (see below), whose sum is σ = 41256198720432. Its totient is φ = 7640036800000.

The previous prime is 21010101200017. The next prime is 21010101200161. The reversal of 21010101200110 is 1100210101012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95500459891 + ... + 95500460110.

It is an arithmetic number, because the mean of its divisors is an integer number (2578512420027).

Almost surely, 2^{21010101200110} is an apocalyptic number.

21010101200110 is a deficient number, since it is larger than the sum of its proper divisors (20246097520322).

21010101200110 is a wasteful number, since it uses less digits than its factorization.

21010101200110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191000920019.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21010101200110 its reverse (1100210101012), we get a palindrome (22110311301122).

The spelling of 21010101200110 in words is "twenty-one trillion, ten billion, one hundred one million, two hundred thousand, one hundred ten".