99923251181212 has 12 divisors (see below), whose sum is σ = 175487987396736. Its totient is φ = 49783826210720.

The previous prime is 99923251181207. The next prime is 99923251181267. The reversal of 99923251181212 is 21218115232999.

It is a super-2 number, since 2×99923251181212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 44449843708 + ... + 44449845955.

It is an arithmetic number, because the mean of its divisors is an integer number (14623998949728).

Almost surely, 2^{99923251181212} is an apocalyptic number.

It is an amenable number.

99923251181212 is a deficient number, since it is larger than the sum of its proper divisors (75564736215524).

99923251181212 is a wasteful number, since it uses less digits than its factorization.

99923251181212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88899689948 (or 88899689946 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 55.

The spelling of 99923251181212 in words is "ninety-nine trillion, nine hundred twenty-three billion, two hundred fifty-one million, one hundred eighty-one thousand, two hundred twelve".