21202100021201 has 16 divisors (see below), whose sum is σ = 23777422820928. Its totient is φ = 18738076108800.

The previous prime is 21202100021117. The next prime is 21202100021239. The reversal of 21202100021201 is 10212000120212.

It is a cyclic number.

It is not a de Polignac number, because 21202100021201 - 2²⁶ = 21202032912337 is a prime.

It is a super-2 number, since 2×21202100021201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202100023201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82931216 + ... + 83186481.

It is an arithmetic number, because the mean of its divisors is an integer number (1486088926308).

Almost surely, 2^{21202100021201} is an apocalyptic number.

It is an amenable number.

21202100021201 is a deficient number, since it is larger than the sum of its proper divisors (2575322799727).

21202100021201 is a wasteful number, since it uses less digits than its factorization.

21202100021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166118032.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21202100021201 its reverse (10212000120212), we get a palindrome (31414100141413).

The spelling of 21202100021201 in words is "twenty-one trillion, two hundred two billion, one hundred million, twenty-one thousand, two hundred one".