101131321 has 2 divisors, whose sum is σ = 101131322. Its totient is φ = 101131320.

The previous prime is 101131309. The next prime is 101131339. The reversal of 101131321 is 123131101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76737600 + 24393721 = 8760^2 + 4939^2 .

It is a cyclic number.

It is not a de Polignac number, because 101131321 - 2¹³ = 101123129 is a prime.

It is not a weakly prime, because it can be changed into another prime (101131301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50565660 + 50565661.

It is an arithmetic number, because the mean of its divisors is an integer number (50565661).

Almost surely, 2^101131321 is an apocalyptic number.

It is an amenable number.

101131321 is a deficient number, since it is larger than the sum of its proper divisors (1).

101131321 is an equidigital number, since it uses as much as digits as its factorization.

101131321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 101131321 is about 10056.4069627278. The cubic root of 101131321 is about 465.9026993889.

Adding to 101131321 its reverse (123131101), we get a palindrome (224262422).

The spelling of 101131321 in words is "one hundred one million, one hundred thirty-one thousand, three hundred twenty-one".