21213010111201 has 4 divisors (see below), whose sum is σ = 22329484327600. Its totient is φ = 20096535894804.

The previous prime is 21213010111187. The next prime is 21213010111217. The reversal of 21213010111201 is 10211101031212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21213010111201 - 2⁵ = 21213010111169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213010171201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558237108171 + ... + 558237108208.

It is an arithmetic number, because the mean of its divisors is an integer number (5582371081900).

Almost surely, 2^{21213010111201} is an apocalyptic number.

It is an amenable number.

21213010111201 is a deficient number, since it is larger than the sum of its proper divisors (1116474216399).

21213010111201 is a wasteful number, since it uses less digits than its factorization.

21213010111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116474216398.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21213010111201 its reverse (10211101031212), we get a palindrome (31424111142413).

The spelling of 21213010111201 in words is "twenty-one trillion, two hundred thirteen billion, ten million, one hundred eleven thousand, two hundred one".