11212321147 has 2 divisors, whose sum is σ = 11212321148. Its totient is φ = 11212321146.

The previous prime is 11212321091. The next prime is 11212321157. The reversal of 11212321147 is 74112321211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11212321147 - 2²³ = 11203932539 is a prime.

It is a super-2 number, since 2×11212321147² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11212321157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606160573 + 5606160574.

It is an arithmetic number, because the mean of its divisors is an integer number (5606160574).

Almost surely, 2^11212321147 is an apocalyptic number.

11212321147 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212321147 is an equidigital number, since it uses as much as digits as its factorization.

11212321147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

Adding to 11212321147 its reverse (74112321211), we get a palindrome (85324642358).

The spelling of 11212321147 in words is "eleven billion, two hundred twelve million, three hundred twenty-one thousand, one hundred forty-seven".