1000012119991 has 2 divisors, whose sum is σ = 1000012119992. Its totient is φ = 1000012119990.

The previous prime is 1000012119947. The next prime is 1000012120057. The reversal of 1000012119991 is 1999112100001.

It is a weak prime.

It is an emirp because it is prime and its reverse (1999112100001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000012119991 - 2¹⁷ = 1000011988919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000012189991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500006059995 + 500006059996.

It is an arithmetic number, because the mean of its divisors is an integer number (500006059996).

Almost surely, 2^{1000012119991} is an apocalyptic number.

1000012119991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000012119991 is an equidigital number, since it uses as much as digits as its factorization.

1000012119991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 34.

Adding to 1000012119991 its reverse (1999112100001), we get a palindrome (2999124219992).

The spelling of 1000012119991 in words is "one trillion, twelve million, one hundred nineteen thousand, nine hundred ninety-one".