37121321 has 2 divisors, whose sum is σ = 37121322. Its totient is φ = 37121320.

The previous prime is 37121317. The next prime is 37121369. The reversal of 37121321 is 12312173.

37121321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35271721 + 1849600 = 5939^2 + 1360^2 .

It is an emirp because it is prime and its reverse (12312173) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37121321 - 2² = 37121317 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 37121293 and 37121302.

It is not a weakly prime, because it can be changed into another prime (37121311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18560660 + 18560661.

It is an arithmetic number, because the mean of its divisors is an integer number (18560661).

Almost surely, 2^37121321 is an apocalyptic number.

It is an amenable number.

37121321 is a deficient number, since it is larger than the sum of its proper divisors (1).

37121321 is an equidigital number, since it uses as much as digits as its factorization.

37121321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 20.

The square root of 37121321 is about 6092.7268936003. The cubic root of 37121321 is about 333.5859936621.

Adding to 37121321 its reverse (12312173), we get a palindrome (49433494).

The spelling of 37121321 in words is "thirty-seven million, one hundred twenty-one thousand, three hundred twenty-one".