11212129989 has 12 divisors (see below), whose sum is σ = 16210212096. Its totient is φ = 7467870312.

The previous prime is 11212129939. The next prime is 11212129991. The reversal of 11212129989 is 98992121211.

It is not a de Polignac number, because 11212129989 - 2¹⁹ = 11211605701 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212129909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 563259 + ... + 582824.

It is an arithmetic number, because the mean of its divisors is an integer number (1350851008).

Almost surely, 2^11212129989 is an apocalyptic number.

It is an amenable number.

11212129989 is a deficient number, since it is larger than the sum of its proper divisors (4998082107).

11212129989 is a wasteful number, since it uses less digits than its factorization.

11212129989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147176 (or 1147173 counting only the distinct ones).

The product of its digits is 46656, while the sum is 45.

The spelling of 11212129989 in words is "eleven billion, two hundred twelve million, one hundred twenty-nine thousand, nine hundred eighty-nine".