111212201291 has 2 divisors, whose sum is σ = 111212201292. Its totient is φ = 111212201290.

The previous prime is 111212201279. The next prime is 111212201333. The reversal of 111212201291 is 192102212111.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (192102212111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111212201291 - 2¹⁴ = 111212184907 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (111212201591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606100645 + 55606100646.

It is an arithmetic number, because the mean of its divisors is an integer number (55606100646).

Almost surely, 2^111212201291 is an apocalyptic number.

111212201291 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212201291 is an equidigital number, since it uses as much as digits as its factorization.

111212201291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 111212201291 in words is "one hundred eleven billion, two hundred twelve million, two hundred one thousand, two hundred ninety-one".