1101997217939 has 2 divisors, whose sum is σ = 1101997217940. Its totient is φ = 1101997217938.

The previous prime is 1101997217863. The next prime is 1101997217953. The reversal of 1101997217939 is 9397127991011.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101997217939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101997217999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550998608969 + 550998608970.

It is an arithmetic number, because the mean of its divisors is an integer number (550998608970).

Almost surely, 2^{1101997217939} is an apocalyptic number.

1101997217939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101997217939 is an equidigital number, since it uses as much as digits as its factorization.

1101997217939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1928934, while the sum is 59.

The spelling of 1101997217939 in words is "one trillion, one hundred one billion, nine hundred ninety-seven million, two hundred seventeen thousand, nine hundred thirty-nine".