21201222010111 has 8 divisors (see below), whose sum is σ = 24907729354704. Its totient is φ = 17791235253120.

The previous prime is 21201222010043. The next prime is 21201222010127. The reversal of 21201222010111 is 11101022210212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21201222010111 - 2²³ = 21201213621503 is a prime.

It is a super-2 number, since 2×21201222010111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201222010151) 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 7 ways as a sum of consecutive naturals, for example, 74130146746 + ... + 74130147031.

It is an arithmetic number, because the mean of its divisors is an integer number (3113466169338).

Almost surely, 2^{21201222010111} is an apocalyptic number.

21201222010111 is a deficient number, since it is larger than the sum of its proper divisors (3706507344593).

21201222010111 is a wasteful number, since it uses less digits than its factorization.

21201222010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148260293801.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21201222010111 its reverse (11101022210212), we get a palindrome (32302244220323).

The spelling of 21201222010111 in words is "twenty-one trillion, two hundred one billion, two hundred twenty-two million, ten thousand, one hundred eleven".