1011020211973 has 2 divisors, whose sum is σ = 1011020211974. Its totient is φ = 1011020211972.

The previous prime is 1011020211961. The next prime is 1011020212003. The reversal of 1011020211973 is 3791120201101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 827457664609 + 183562547364 = 909647^2 + 428442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011020211973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011020211953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505510105986 + 505510105987.

It is an arithmetic number, because the mean of its divisors is an integer number (505510105987).

Almost surely, 2^{1011020211973} is an apocalyptic number.

It is an amenable number.

1011020211973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011020211973 is an equidigital number, since it uses as much as digits as its factorization.

1011020211973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 28.

The spelling of 1011020211973 in words is "one trillion, eleven billion, twenty million, two hundred eleven thousand, nine hundred seventy-three".