1011111121939 has 2 divisors, whose sum is σ = 1011111121940. Its totient is φ = 1011111121938.

The previous prime is 1011111121931. The next prime is 1011111121981. The reversal of 1011111121939 is 9391211111101.

It is a weak prime.

It is an emirp because it is prime and its reverse (9391211111101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011111121939 - 2³ = 1011111121931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011111121939.

It is not a weakly prime, because it can be changed into another prime (1011111121931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505555560969 + 505555560970.

It is an arithmetic number, because the mean of its divisors is an integer number (505555560970).

Almost surely, 2^{1011111121939} is an apocalyptic number.

1011111121939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011111121939 is an equidigital number, since it uses as much as digits as its factorization.

1011111121939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 31.

The spelling of 1011111121939 in words is "one trillion, eleven billion, one hundred eleven million, one hundred twenty-one thousand, nine hundred thirty-nine".