1011211119491 has 2 divisors, whose sum is σ = 1011211119492. Its totient is φ = 1011211119490.

The previous prime is 1011211119427. The next prime is 1011211119547. The reversal of 1011211119491 is 1949111121101.

It is a happy number.

1011211119491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1011211119491 - 2⁶ = 1011211119427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1011211119421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505605559745 + 505605559746.

It is an arithmetic number, because the mean of its divisors is an integer number (505605559746).

Almost surely, 2^{1011211119491} is an apocalyptic number.

1011211119491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011211119491 is an equidigital number, since it uses as much as digits as its factorization.

1011211119491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 32.

The spelling of 1011211119491 in words is "one trillion, eleven billion, two hundred eleven million, one hundred nineteen thousand, four hundred ninety-one".