1244027421277 has 2 divisors, whose sum is σ = 1244027421278. Its totient is φ = 1244027421276.

The previous prime is 1244027421193. The next prime is 1244027421283. The reversal of 1244027421277 is 7721247204421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1242090189081 + 1937232196 = 1114491^2 + 44014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244027421277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244027431277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622013710638 + 622013710639.

It is an arithmetic number, because the mean of its divisors is an integer number (622013710639).

Almost surely, 2^{1244027421277} is an apocalyptic number.

It is an amenable number.

1244027421277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244027421277 is an equidigital number, since it uses as much as digits as its factorization.

1244027421277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 351232, while the sum is 43.

The spelling of 1244027421277 in words is "one trillion, two hundred forty-four billion, twenty-seven million, four hundred twenty-one thousand, two hundred seventy-seven".