3132221021 has 4 divisors (see below), whose sum is σ = 3132544032. Its totient is φ = 3131898012.

The previous prime is 3132220991. The next prime is 3132221023. The reversal of 3132221021 is 1201222313.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1201222313 = 19 ⋅63222227.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3132221021 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 (3132221023) 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, 146495 + ... + 166508.

It is an arithmetic number, because the mean of its divisors is an integer number (783136008).

Almost surely, 2^3132221021 is an apocalyptic number.

It is an amenable number.

3132221021 is a deficient number, since it is larger than the sum of its proper divisors (323011).

3132221021 is a wasteful number, since it uses less digits than its factorization.

3132221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323010.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3132221021 is about 55966.2489452348. The cubic root of 3132221021 is about 1463.1341038339.

Adding to 3132221021 its reverse (1201222313), we get a palindrome (4333443334).

The spelling of 3132221021 in words is "three billion, one hundred thirty-two million, two hundred twenty-one thousand, twenty-one".