11212989 has 4 divisors (see below), whose sum is σ = 14950656. Its totient is φ = 7475324.

The previous prime is 11212987. The next prime is 11212997. The reversal of 11212989 is 98921211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11212989 - 2¹ = 11212987 is a prime.

It is a super-2 number, since 2×11212989² = 251462244628242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1868829 + ... + 1868834.

It is an arithmetic number, because the mean of its divisors is an integer number (3737664).

Almost surely, 2^11212989 is an apocalyptic number.

It is an amenable number.

11212989 is a deficient number, since it is larger than the sum of its proper divisors (3737667).

11212989 is an equidigital number, since it uses as much as digits as its factorization.

11212989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737666.

The product of its digits is 2592, while the sum is 33.

The square root of 11212989 is about 3348.5801468682. The cubic root of 11212989 is about 223.8242469702.

The spelling of 11212989 in words is "eleven million, two hundred twelve thousand, nine hundred eighty-nine".