891123122212 has 12 divisors (see below), whose sum is σ = 1560423966640. Its totient is φ = 445287703176.

The previous prime is 891123122207. The next prime is 891123122231. The reversal of 891123122212 is 212221321198.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 68457162 + ... + 68470177.

Almost surely, 2^891123122212 is an apocalyptic number.

It is an amenable number.

891123122212 is a deficient number, since it is larger than the sum of its proper divisors (669300844428).

891123122212 is a wasteful number, since it uses less digits than its factorization.

891123122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136928970 (or 136928968 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The spelling of 891123122212 in words is "eight hundred ninety-one billion, one hundred twenty-three million, one hundred twenty-two thousand, two hundred twelve".