21010121110202 has 32 divisors (see below), whose sum is σ = 36393731979264. Its totient is φ = 8910695718000.

The previous prime is 21010121110193. The next prime is 21010121110247. The reversal of 21010121110202 is 20201112101012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18338624 + ... + 19450587.

It is an arithmetic number, because the mean of its divisors is an integer number (1137304124352).

Almost surely, 2^{21010121110202} is an apocalyptic number.

21010121110202 is a deficient number, since it is larger than the sum of its proper divisors (15383610869062).

21010121110202 is a wasteful number, since it uses less digits than its factorization.

21010121110202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37789634.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21010121110202 its reverse (20201112101012), we get a palindrome (41211233211214).

The spelling of 21010121110202 in words is "twenty-one trillion, ten billion, one hundred twenty-one million, one hundred ten thousand, two hundred two".