21201131111320 has 32 divisors (see below), whose sum is σ = 47839228542000. Its totient is φ = 8456153148288.

The previous prime is 21201131111309. The next prime is 21201131111423. The reversal of 21201131111320 is 2311113110212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759338874 + ... + 759366793.

Almost surely, 2^{21201131111320} is an apocalyptic number.

21201131111320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201131111320 is an abundant number, since it is smaller than the sum of its proper divisors (26638097430680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21201131111320 is a wasteful number, since it uses less digits than its factorization.

21201131111320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518706027 (or 1518706023 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21201131111320 its reverse (2311113110212), we get a palindrome (23512244221532).

The spelling of 21201131111320 in words is "twenty-one trillion, two hundred one billion, one hundred thirty-one million, one hundred eleven thousand, three hundred twenty".