32121023440 has 80 divisors (see below), whose sum is σ = 81504444096. Its totient is φ = 11675520000.

The previous prime is 32121023437. The next prime is 32121023443. The reversal of 32121023440 is 4432012123.

It is an interprime number because it is at equal distance from previous prime (32121023437) and next prime (32121023443).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32121023443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2634799 + ... + 2646961.

Almost surely, 2^32121023440 is an apocalyptic number.

It is an amenable number.

32121023440 is an abundant number, since it is smaller than the sum of its proper divisors (49383420656).

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

32121023440 is a wasteful number, since it uses less digits than its factorization.

32121023440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15188 (or 15182 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 32121023440 its reverse (4432012123), we get a palindrome (36553035563).

The spelling of 32121023440 in words is "thirty-two billion, one hundred twenty-one million, twenty-three thousand, four hundred forty".