1220203332991 has 2 divisors, whose sum is σ = 1220203332992. Its totient is φ = 1220203332990.

The previous prime is 1220203332967. The next prime is 1220203333031. The reversal of 1220203332991 is 1992333020221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220203332991 - 2²¹ = 1220201235839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220203332991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220203330991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610101666495 + 610101666496.

It is an arithmetic number, because the mean of its divisors is an integer number (610101666496).

Almost surely, 2^{1220203332991} is an apocalyptic number.

1220203332991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220203332991 is an equidigital number, since it uses as much as digits as its factorization.

1220203332991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 37.

The spelling of 1220203332991 in words is "one trillion, two hundred twenty billion, two hundred three million, three hundred thirty-two thousand, nine hundred ninety-one".