21231120201112 has 16 divisors (see below), whose sum is σ = 39809229963840. Its totient is φ = 10615325544096.

The previous prime is 21231120201091. The next prime is 21231120201113. The reversal of 21231120201112 is 21110202113212.

It is a self number, because there is not a number n which added to its sum of digits gives 21231120201112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231120201113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28934568 + ... + 29659255.

It is an arithmetic number, because the mean of its divisors is an integer number (2488076872740).

Almost surely, 2^{21231120201112} is an apocalyptic number.

It is an amenable number.

21231120201112 is a deficient number, since it is larger than the sum of its proper divisors (18578109762728).

21231120201112 is a wasteful number, since it uses less digits than its factorization.

21231120201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58639122 (or 58639118 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21231120201112 its reverse (21110202113212), we get a palindrome (42341322314324).

The spelling of 21231120201112 in words is "twenty-one trillion, two hundred thirty-one billion, one hundred twenty million, two hundred one thousand, one hundred twelve".