13100233221821 has 2 divisors, whose sum is σ = 13100233221822. Its totient is φ = 13100233221820.

The previous prime is 13100233221793. The next prime is 13100233221841. The reversal of 13100233221821 is 12812233200131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13082247729721 + 17985492100 = 3616939^2 + 134110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13100233221821 is a prime.

It is a super-2 number, since 2×13100233221821² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13100233221841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6550116610910 + 6550116610911.

It is an arithmetic number, because the mean of its divisors is an integer number (6550116610911).

Almost surely, 2^{13100233221821} is an apocalyptic number.

It is an amenable number.

13100233221821 is a deficient number, since it is larger than the sum of its proper divisors (1).

13100233221821 is an equidigital number, since it uses as much as digits as its factorization.

13100233221821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 13100233221821 its reverse (12812233200131), we get a palindrome (25912466421952).

The spelling of 13100233221821 in words is "thirteen trillion, one hundred billion, two hundred thirty-three million, two hundred twenty-one thousand, eight hundred twenty-one".