320021131 has 2 divisors, whose sum is σ = 320021132. Its totient is φ = 320021130.

The previous prime is 320021101. The next prime is 320021159. The reversal of 320021131 is 131120023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320021131 - 2¹¹ = 320019083 is a prime.

It is a super-2 number, since 2×320021131² = 204827048573038322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320021101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160010565 + 160010566.

It is an arithmetic number, because the mean of its divisors is an integer number (160010566).

Almost surely, 2^320021131 is an apocalyptic number.

320021131 is a deficient number, since it is larger than the sum of its proper divisors (1).

320021131 is an equidigital number, since it uses as much as digits as its factorization.

320021131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 320021131 is about 17889.1344396536. The cubic root of 320021131 is about 684.0054339650.

Adding to 320021131 its reverse (131120023), we get a palindrome (451141154).

It can be divided in two parts, 32002 and 1131, that added together give a palindrome (33133).

The spelling of 320021131 in words is "three hundred twenty million, twenty-one thousand, one hundred thirty-one".