421244442137 has 2 divisors, whose sum is σ = 421244442138. Its totient is φ = 421244442136.

The previous prime is 421244442119. The next prime is 421244442163. The reversal of 421244442137 is 731244442124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 341658954256 + 79585487881 = 584516^2 + 282109^2 .

It is a cyclic number.

It is not a de Polignac number, because 421244442137 - 2¹⁰ = 421244441113 is a prime.

It is a super-2 number, since 2×421244442137² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421244442137.

It is not a weakly prime, because it can be changed into another prime (421244442737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210622221068 + 210622221069.

It is an arithmetic number, because the mean of its divisors is an integer number (210622221069).

Almost surely, 2^421244442137 is an apocalyptic number.

It is an amenable number.

421244442137 is a deficient number, since it is larger than the sum of its proper divisors (1).

421244442137 is an equidigital number, since it uses as much as digits as its factorization.

421244442137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 38.

The spelling of 421244442137 in words is "four hundred twenty-one billion, two hundred forty-four million, four hundred forty-two thousand, one hundred thirty-seven".