1021112020811 has 2 divisors, whose sum is σ = 1021112020812. Its totient is φ = 1021112020810.

The previous prime is 1021112020661. The next prime is 1021112020843. The reversal of 1021112020811 is 1180202111201.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1180202111201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021112020811 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1021112020861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510556010405 + 510556010406.

It is an arithmetic number, because the mean of its divisors is an integer number (510556010406).

Almost surely, 2^{1021112020811} is an apocalyptic number.

1021112020811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021112020811 is an equidigital number, since it uses as much as digits as its factorization.

1021112020811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 20.

The spelling of 1021112020811 in words is "one trillion, twenty-one billion, one hundred twelve million, twenty thousand, eight hundred eleven".