21010122211101 has 16 divisors (see below), whose sum is σ = 28029727440000. Its totient is φ = 13998634769088.

The previous prime is 21010122211073. The next prime is 21010122211139. The reversal of 21010122211101 is 10111222101012.

It is a happy number.

It is not a de Polignac number, because 21010122211101 - 2²⁹ = 21009585340189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010122211181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38315475 + ... + 38859951.

It is an arithmetic number, because the mean of its divisors is an integer number (1751857965000).

Almost surely, 2^{21010122211101} is an apocalyptic number.

It is an amenable number.

21010122211101 is a deficient number, since it is larger than the sum of its proper divisors (7019605228899).

21010122211101 is a wasteful number, since it uses less digits than its factorization.

21010122211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551908.

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

Adding to 21010122211101 its reverse (10111222101012), we get a palindrome (31121344312113).

The spelling of 21010122211101 in words is "twenty-one trillion, ten billion, one hundred twenty-two million, two hundred eleven thousand, one hundred one".