1201844339651 has 2 divisors, whose sum is σ = 1201844339652. Its totient is φ = 1201844339650.

The previous prime is 1201844339581. The next prime is 1201844339659. The reversal of 1201844339651 is 1569334481021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1201844339651 - 2¹⁸ = 1201844077507 is a prime.

It is a super-2 number, since 2×1201844339651² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1201844339596 and 1201844339605.

It is not a weakly prime, because it can be changed into another prime (1201844339659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600922169825 + 600922169826.

It is an arithmetic number, because the mean of its divisors is an integer number (600922169826).

Almost surely, 2^{1201844339651} is an apocalyptic number.

1201844339651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201844339651 is an equidigital number, since it uses as much as digits as its factorization.

1201844339651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 1201844339651 in words is "one trillion, two hundred one billion, eight hundred forty-four million, three hundred thirty-nine thousand, six hundred fifty-one".