99991211112222 has 16 divisors (see below), whose sum is σ = 199982682475392. Its totient is φ = 33330360328920.

The previous prime is 99991211112211. The next prime is 99991211112241. The reversal of 99991211112222 is 22221111219999.

It is a congruent number.

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, 5658304 + ... + 15231507.

It is an arithmetic number, because the mean of its divisors is an integer number (12498917654712).

Almost surely, 2^{99991211112222} is an apocalyptic number.

99991211112222 is an abundant number, since it is smaller than the sum of its proper divisors (99991471363170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99991211112222 is a wasteful number, since it uses less digits than its factorization.

99991211112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21687583.

The product of its digits is 209952, while the sum is 51.

The spelling of 99991211112222 in words is "ninety-nine trillion, nine hundred ninety-one billion, two hundred eleven million, one hundred twelve thousand, two hundred twenty-two".