1033221121991 has 2 divisors, whose sum is σ = 1033221121992. Its totient is φ = 1033221121990.

The previous prime is 1033221121951. The next prime is 1033221122023. The reversal of 1033221121991 is 1991211223301.

1033221121991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1991211223301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1033221121991 - 2³⁰ = 1032147380167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1033221121951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 516610560995 + 516610560996.

It is an arithmetic number, because the mean of its divisors is an integer number (516610560996).

Almost surely, 2^{1033221121991} is an apocalyptic number.

1033221121991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1033221121991 is an equidigital number, since it uses as much as digits as its factorization.

1033221121991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The spelling of 1033221121991 in words is "one trillion, thirty-three billion, two hundred twenty-one million, one hundred twenty-one thousand, nine hundred ninety-one".