9891110222212 has 6 divisors (see below), whose sum is σ = 17309442888878. Its totient is φ = 4945555111104.

The previous prime is 9891110222209. The next prime is 9891110222239. The reversal of 9891110222212 is 2122220111989.

It can be written as a sum of positive squares in only one way, i.e., 9290584418116 + 600525804096 = 3048046^2 + 774936^2 .

It is a super-2 number, since 2×9891110222212² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1236388777773 + ... + 1236388777780.

Almost surely, 2^{9891110222212} is an apocalyptic number.

It is an amenable number.

9891110222212 is a deficient number, since it is larger than the sum of its proper divisors (7418332666666).

9891110222212 is a wasteful number, since it uses less digits than its factorization.

9891110222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472777555557 (or 2472777555555 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 40.

The spelling of 9891110222212 in words is "nine trillion, eight hundred ninety-one billion, one hundred ten million, two hundred twenty-two thousand, two hundred twelve".