11212011427 has 2 divisors, whose sum is σ = 11212011428. Its totient is φ = 11212011426.

The previous prime is 11212011389. The next prime is 11212011443. The reversal of 11212011427 is 72411021211.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (72411021211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11212011427 - 2¹⁹ = 11211487139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11212011398 and 11212011407.

It is not a weakly prime, because it can be changed into another prime (11212011127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606005713 + 5606005714.

It is an arithmetic number, because the mean of its divisors is an integer number (5606005714).

Almost surely, 2^11212011427 is an apocalyptic number.

11212011427 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212011427 is an equidigital number, since it uses as much as digits as its factorization.

11212011427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 11212011427 its reverse (72411021211), we get a palindrome (83623032638).

The spelling of 11212011427 in words is "eleven billion, two hundred twelve million, eleven thousand, four hundred twenty-seven".