1022211978947 has 2 divisors, whose sum is σ = 1022211978948. Its totient is φ = 1022211978946.

The previous prime is 1022211978937. The next prime is 1022211978989. The reversal of 1022211978947 is 7498791122201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1022211978947 - 2¹² = 1022211974851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1022211978937) 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, 511105989473 + 511105989474.

It is an arithmetic number, because the mean of its divisors is an integer number (511105989474).

Almost surely, 2^{1022211978947} is an apocalyptic number.

1022211978947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022211978947 is an equidigital number, since it uses as much as digits as its factorization.

1022211978947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The spelling of 1022211978947 in words is "one trillion, twenty-two billion, two hundred eleven million, nine hundred seventy-eight thousand, nine hundred forty-seven".