43320321221 has 8 divisors (see below), whose sum is σ = 45205903104. Its totient is φ = 41434913520.

The previous prime is 43320321137. The next prime is 43320321269. The reversal of 43320321221 is 12212302334.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43320321221 - 2¹⁴ = 43320304837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43320320221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899075 + ... + 946031.

It is an arithmetic number, because the mean of its divisors is an integer number (5650737888).

Almost surely, 2^43320321221 is an apocalyptic number.

It is an amenable number.

43320321221 is a deficient number, since it is larger than the sum of its proper divisors (1885581883).

43320321221 is a wasteful number, since it uses less digits than its factorization.

43320321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87091.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 43320321221 its reverse (12212302334), we get a palindrome (55532623555).

The spelling of 43320321221 in words is "forty-three billion, three hundred twenty million, three hundred twenty-one thousand, two hundred twenty-one".