21201200201111 has 8 divisors (see below), whose sum is σ = 24230125149984. Its totient is φ = 18172320768000.

The previous prime is 21201200201057. The next prime is 21201200201119. The reversal of 21201200201111 is 11110200210212.

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

It is a de Polignac number, because none of the positive numbers 2^k-21201200201111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201200201119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10374890 + ... + 12249111.

It is an arithmetic number, because the mean of its divisors is an integer number (3028765643748).

Almost surely, 2^{21201200201111} is an apocalyptic number.

21201200201111 is a deficient number, since it is larger than the sum of its proper divisors (3028924948873).

21201200201111 is a wasteful number, since it uses less digits than its factorization.

21201200201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22757881.

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

Adding to 21201200201111 its reverse (11110200210212), we get a palindrome (32311400411323).

The spelling of 21201200201111 in words is "twenty-one trillion, two hundred one billion, two hundred million, two hundred one thousand, one hundred eleven".