102011211811 has 2 divisors, whose sum is σ = 102011211812. Its totient is φ = 102011211810.

The previous prime is 102011211779. The next prime is 102011211821. The reversal of 102011211811 is 118112110201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102011211811 - 2⁵ = 102011211779 is a prime.

It is not a weakly prime, because it can be changed into another prime (102011211821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51005605905 + 51005605906.

It is an arithmetic number, because the mean of its divisors is an integer number (51005605906).

Almost surely, 2^102011211811 is an apocalyptic number.

102011211811 is a deficient number, since it is larger than the sum of its proper divisors (1).

102011211811 is an equidigital number, since it uses as much as digits as its factorization.

102011211811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 19.

The spelling of 102011211811 in words is "one hundred two billion, eleven million, two hundred eleven thousand, eight hundred eleven".