68020111107881 has 2 divisors, whose sum is σ = 68020111107882. Its totient is φ = 68020111107880.

The previous prime is 68020111107859. The next prime is 68020111107911. The reversal of 68020111107881 is 18870111102086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47233441730281 + 20786669377600 = 6872659^2 + 4559240^2 .

It is a cyclic number.

It is not a de Polignac number, because 68020111107881 - 2³⁰ = 68019037366057 is a prime.

It is a super-2 number, since 2×68020111107881² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68020111103881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34010055553940 + 34010055553941.

It is an arithmetic number, because the mean of its divisors is an integer number (34010055553941).

Almost surely, 2^{68020111107881} is an apocalyptic number.

It is an amenable number.

68020111107881 is a deficient number, since it is larger than the sum of its proper divisors (1).

68020111107881 is an equidigital number, since it uses as much as digits as its factorization.

68020111107881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 44.

The spelling of 68020111107881 in words is "sixty-eight trillion, twenty billion, one hundred eleven million, one hundred seven thousand, eight hundred eighty-one".