9999121011222 has 32 divisors (see below), whose sum is σ = 22855337164800. Its totient is φ = 2856866289408.

The previous prime is 9999121011199. The next prime is 9999121011247. The reversal of 9999121011222 is 2221101219999.

It is a super-2 number, since 2×9999121011222² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3999654 + ... + 5999622.

It is an arithmetic number, because the mean of its divisors is an integer number (714229286400).

Almost surely, 2^{9999121011222} is an apocalyptic number.

9999121011222 is an abundant number, since it is smaller than the sum of its proper divisors (12856216153578).

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

9999121011222 is a wasteful number, since it uses less digits than its factorization.

9999121011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119020.

The product of its (nonzero) digits is 104976, while the sum is 48.

The spelling of 9999121011222 in words is "nine trillion, nine hundred ninety-nine billion, one hundred twenty-one million, eleven thousand, two hundred twenty-two".