1020011220191 has 2 divisors, whose sum is σ = 1020011220192. Its totient is φ = 1020011220190.

The previous prime is 1020011220169. The next prime is 1020011220209. The reversal of 1020011220191 is 1910221100201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020011220191 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020011220791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510005610095 + 510005610096.

It is an arithmetic number, because the mean of its divisors is an integer number (510005610096).

Almost surely, 2^{1020011220191} is an apocalyptic number.

1020011220191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020011220191 is an equidigital number, since it uses as much as digits as its factorization.

1020011220191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 1020011220191 its reverse (1910221100201), we get a palindrome (2930232320392).

The spelling of 1020011220191 in words is "one trillion, twenty billion, eleven million, two hundred twenty thousand, one hundred ninety-one".