21231101120 has 56 divisors (see below), whose sum is σ = 50736691008. Its totient is φ = 8462182400.

The previous prime is 21231101113. The next prime is 21231101123. The reversal of 21231101120 is 2110113212.

It is a junction number, because it is equal to n+sod(n) for n = 21231101095 and 21231101104.

It is not an unprimeable number, because it can be changed into a prime (21231101123) 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, 28136 + ... + 207975.

Almost surely, 2^21231101120 is an apocalyptic number.

21231101120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21231101120 is an abundant number, since it is smaller than the sum of its proper divisors (29505589888).

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

21231101120 is a wasteful number, since it uses less digits than its factorization.

21231101120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236409 (or 236399 counting only the distinct ones).

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

Adding to 21231101120 its reverse (2110113212), we get a palindrome (23341214332).

The spelling of 21231101120 in words is "twenty-one billion, two hundred thirty-one million, one hundred one thousand, one hundred twenty".