2001221196019 has 2 divisors, whose sum is σ = 2001221196020. Its totient is φ = 2001221196018.

The previous prime is 2001221195999. The next prime is 2001221196031. The reversal of 2001221196019 is 9106911221002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001221196019 - 2⁹ = 2001221195507 is a prime.

It is a super-2 number, since 2×2001221196019² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2001221190019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610598009 + 1000610598010.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610598010).

Almost surely, 2^{2001221196019} is an apocalyptic number.

2001221196019 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001221196019 is an equidigital number, since it uses as much as digits as its factorization.

2001221196019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 2001221196019 in words is "two trillion, one billion, two hundred twenty-one million, one hundred ninety-six thousand, nineteen".