21201120311 has 16 divisors (see below), whose sum is σ = 24427898880. Its totient is φ = 18024085440.

The previous prime is 21201120301. The next prime is 21201120337. The reversal of 21201120311 is 11302110212.

It is a cyclic number.

It is not a de Polignac number, because 21201120311 - 2⁶ = 21201120247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201120301) 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 15 ways as a sum of consecutive naturals, for example, 1171550 + ... + 1189508.

It is an arithmetic number, because the mean of its divisors is an integer number (1526743680).

Almost surely, 2^21201120311 is an apocalyptic number.

21201120311 is a deficient number, since it is larger than the sum of its proper divisors (3226778569).

21201120311 is a wasteful number, since it uses less digits than its factorization.

21201120311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19334.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21201120311 its reverse (11302110212), we get a palindrome (32503230523).

The spelling of 21201120311 in words is "twenty-one billion, two hundred one million, one hundred twenty thousand, three hundred eleven".