1220011001191 has 2 divisors, whose sum is σ = 1220011001192. Its totient is φ = 1220011001190.

The previous prime is 1220011001189. The next prime is 1220011001233. The reversal of 1220011001191 is 1911001100221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220011001191 - 2¹ = 1220011001189 is a prime.

Together with 1220011001189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220011001101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610005500595 + 610005500596.

It is an arithmetic number, because the mean of its divisors is an integer number (610005500596).

Almost surely, 2^{1220011001191} is an apocalyptic number.

1220011001191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220011001191 is an equidigital number, since it uses as much as digits as its factorization.

1220011001191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 1220011001191 in words is "one trillion, two hundred twenty billion, eleven million, one thousand, one hundred ninety-one".