991201022010212 has 24 divisors (see below), whose sum is σ = 1868085631054272. Its totient is φ = 457464430922400.

The previous prime is 991201022010193. The next prime is 991201022010271. The reversal of 991201022010212 is 212010220102199.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268227464 + ... + 271897727.

It is an arithmetic number, because the mean of its divisors is an integer number (77836901293928).

Almost surely, 2^{991201022010212} is an apocalyptic number.

It is an amenable number.

991201022010212 is a deficient number, since it is larger than the sum of its proper divisors (876884609044060).

991201022010212 is a wasteful number, since it uses less digits than its factorization.

991201022010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540160499 (or 540160497 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 991201022010212 in words is "nine hundred ninety-one trillion, two hundred one billion, twenty-two million, ten thousand, two hundred twelve".