1012211021191 has 2 divisors, whose sum is σ = 1012211021192. Its totient is φ = 1012211021190.

The previous prime is 1012211021153. The next prime is 1012211021219. The reversal of 1012211021191 is 1911201122101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1012211021191 - 2¹¹ = 1012211019143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012211021891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506105510595 + 506105510596.

It is an arithmetic number, because the mean of its divisors is an integer number (506105510596).

Almost surely, 2^{1012211021191} is an apocalyptic number.

1012211021191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012211021191 is an equidigital number, since it uses as much as digits as its factorization.

1012211021191 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 22.

Adding to 1012211021191 its reverse (1911201122101), we get a palindrome (2923412143292).

The spelling of 1012211021191 in words is "one trillion, twelve billion, two hundred eleven million, twenty-one thousand, one hundred ninety-one".