21310120032 has 48 divisors (see below), whose sum is σ = 56366114112. Its totient is φ = 7049144960.

The previous prime is 21310120001. The next prime is 21310120043. The reversal of 21310120032 is 23002101312.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 21310119993 and 21310120020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834678 + ... + 859829.

It is an arithmetic number, because the mean of its divisors is an integer number (1174294044).

Almost surely, 2^21310120032 is an apocalyptic number.

It is an amenable number.

21310120032 is an abundant number, since it is smaller than the sum of its proper divisors (35055994080).

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

21310120032 is a wasteful number, since it uses less digits than its factorization.

21310120032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694651 (or 1694643 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21310120032 its reverse (23002101312), we get a palindrome (44312221344).

The spelling of 21310120032 in words is "twenty-one billion, three hundred ten million, one hundred twenty thousand, thirty-two".