32131221013 has 4 divisors (see below), whose sum is σ = 32157323968. Its totient is φ = 32105118060.

The previous prime is 32131220963. The next prime is 32131221019. The reversal of 32131221013 is 31012213123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32131221013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32131221019) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13049631 + ... + 13052092.

It is an arithmetic number, because the mean of its divisors is an integer number (8039330992).

Almost surely, 2^32131221013 is an apocalyptic number.

It is an amenable number.

32131221013 is a deficient number, since it is larger than the sum of its proper divisors (26102955).

32131221013 is a wasteful number, since it uses less digits than its factorization.

32131221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26102954.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 32131221013 its reverse (31012213123), we get a palindrome (63143434136).

The spelling of 32131221013 in words is "thirty-two billion, one hundred thirty-one million, two hundred twenty-one thousand, thirteen".