1220976291439 has 2 divisors, whose sum is σ = 1220976291440. Its totient is φ = 1220976291438.

The previous prime is 1220976291407. The next prime is 1220976291497. The reversal of 1220976291439 is 9341926790221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220976291439 - 2⁵ = 1220976291407 is a prime.

It is a super-2 number, since 2×1220976291439² (a number of 25 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 1220976291439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220976291739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610488145719 + 610488145720.

It is an arithmetic number, because the mean of its divisors is an integer number (610488145720).

Almost surely, 2^{1220976291439} is an apocalyptic number.

1220976291439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220976291439 is an equidigital number, since it uses as much as digits as its factorization.

1220976291439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 1220976291439 in words is "one trillion, two hundred twenty billion, nine hundred seventy-six million, two hundred ninety-one thousand, four hundred thirty-nine".