1011385407881 has 2 divisors, whose sum is σ = 1011385407882. Its totient is φ = 1011385407880.

The previous prime is 1011385407749. The next prime is 1011385407931. The reversal of 1011385407881 is 1887045831101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 600067129600 + 411318278281 = 774640^2 + 641341^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011385407881 - 2³⁰ = 1010311666057 is a prime.

It is a super-2 number, since 2×1011385407881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1011385407581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505692703940 + 505692703941.

It is an arithmetic number, because the mean of its divisors is an integer number (505692703941).

Almost surely, 2^{1011385407881} is an apocalyptic number.

It is an amenable number.

1011385407881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011385407881 is an equidigital number, since it uses as much as digits as its factorization.

1011385407881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 47.

The spelling of 1011385407881 in words is "one trillion, eleven billion, three hundred eighty-five million, four hundred seven thousand, eight hundred eighty-one".