13331221037 has 2 divisors, whose sum is σ = 13331221038. Its totient is φ = 13331221036.

The previous prime is 13331221003. The next prime is 13331221049. The reversal of 13331221037 is 73012213331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12424669156 + 906551881 = 111466^2 + 30109^2 .

It is a cyclic number.

It is not a de Polignac number, because 13331221037 - 2¹⁶ = 13331155501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13331220997 and 13331221015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13331220037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6665610518 + 6665610519.

It is an arithmetic number, because the mean of its divisors is an integer number (6665610519).

Almost surely, 2^13331221037 is an apocalyptic number.

It is an amenable number.

13331221037 is a deficient number, since it is larger than the sum of its proper divisors (1).

13331221037 is an equidigital number, since it uses as much as digits as its factorization.

13331221037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 26.

Adding to 13331221037 its reverse (73012213331), we get a palindrome (86343434368).

The spelling of 13331221037 in words is "thirteen billion, three hundred thirty-one million, two hundred twenty-one thousand, thirty-seven".