32121020 has 48 divisors (see below), whose sum is σ = 71638560. Its totient is φ = 12063744.

The previous prime is 32120993. The next prime is 32121029. The reversal of 32121020 is 2012123.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 32120992 and 32121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32121029) 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, 51752 + ... + 52368.

It is an arithmetic number, because the mean of its divisors is an integer number (1492470).

Almost surely, 2^32121020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35819280).

32121020 is an abundant number, since it is smaller than the sum of its proper divisors (39517540).

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

32121020 is a wasteful number, since it uses less digits than its factorization.

32121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 32121020 is about 5667.5409129533. The cubic root of 32121020 is about 317.8799304095.

Adding to 32121020 its reverse (2012123), we get a palindrome (34133143).

The spelling of 32121020 in words is "thirty-two million, one hundred twenty-one thousand, twenty".