11998021127 has 2 divisors, whose sum is σ = 11998021128. Its totient is φ = 11998021126.

The previous prime is 11998021111. The next prime is 11998021159. The reversal of 11998021127 is 72112089911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11998021127 - 2⁴ = 11998021111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11998021177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5999010563 + 5999010564.

It is an arithmetic number, because the mean of its divisors is an integer number (5999010564).

Almost surely, 2^11998021127 is an apocalyptic number.

11998021127 is a deficient number, since it is larger than the sum of its proper divisors (1).

11998021127 is an equidigital number, since it uses as much as digits as its factorization.

11998021127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 41.

The spelling of 11998021127 in words is "eleven billion, nine hundred ninety-eight million, twenty-one thousand, one hundred twenty-seven".