320737162221 has 12 divisors (see below), whose sum is σ = 529470871072. Its totient is φ = 183278378376.

The previous prime is 320737162219. The next prime is 320737162223. The reversal of 320737162221 is 122261737023.

320737162221 is a `hidden beast` number, since 3 + 2 + 0 + 7 + 3 + 7 + 1 + 622 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (320737162219) and next prime (320737162223).

It is not a de Polignac number, because 320737162221 - 2¹ = 320737162219 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 (320737162223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2545532971 + ... + 2545533096.

Almost surely, 2^320737162221 is an apocalyptic number.

It is an amenable number.

320737162221 is a deficient number, since it is larger than the sum of its proper divisors (208733708851).

320737162221 is a wasteful number, since it uses less digits than its factorization.

320737162221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091066080 (or 5091066077 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

Adding to 320737162221 its reverse (122261737023), we get a palindrome (442998899244).

The spelling of 320737162221 in words is "three hundred twenty billion, seven hundred thirty-seven million, one hundred sixty-two thousand, two hundred twenty-one".