1021001101973 has 2 divisors, whose sum is σ = 1021001101974. Its totient is φ = 1021001101972.

The previous prime is 1021001101937. The next prime is 1021001102027. The reversal of 1021001101973 is 3791011001201.

Together with previous prime (1021001101937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 766846987204 + 254154114769 = 875698^2 + 504137^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021001101973 - 2⁶ = 1021001101909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021001101903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510500550986 + 510500550987.

It is an arithmetic number, because the mean of its divisors is an integer number (510500550987).

Almost surely, 2^{1021001101973} is an apocalyptic number.

It is an amenable number.

1021001101973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021001101973 is an equidigital number, since it uses as much as digits as its factorization.

1021001101973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 26.

The spelling of 1021001101973 in words is "one trillion, twenty-one billion, one million, one hundred one thousand, nine hundred seventy-three".