12221203837 has 2 divisors, whose sum is σ = 12221203838. Its totient is φ = 12221203836.

The previous prime is 12221203829. The next prime is 12221203871. The reversal of 12221203837 is 73830212221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7247287161 + 4973916676 = 85131^2 + 70526^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221203837 - 2³ = 12221203829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12221203799 and 12221203808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221203037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110601918 + 6110601919.

It is an arithmetic number, because the mean of its divisors is an integer number (6110601919).

Almost surely, 2^12221203837 is an apocalyptic number.

It is an amenable number.

12221203837 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221203837 is an equidigital number, since it uses as much as digits as its factorization.

12221203837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 12221203837 in words is "twelve billion, two hundred twenty-one million, two hundred three thousand, eight hundred thirty-seven".