99901120021212 has 96 divisors (see below), whose sum is σ = 266426481484800. Its totient is φ = 28945099144192.

The previous prime is 99901120021181. The next prime is 99901120021217. The reversal of 99901120021212 is 21212002110999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99901120021217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 366963912 + ... + 367236047.

It is an arithmetic number, because the mean of its divisors is an integer number (2775275848800).

Almost surely, 2^{99901120021212} is an apocalyptic number.

99901120021212 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

99901120021212 is an abundant number, since it is smaller than the sum of its proper divisors (166525361463588).

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

99901120021212 is a wasteful number, since it uses less digits than its factorization.

99901120021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734200035 (or 734200033 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 99901120021212 in words is "ninety-nine trillion, nine hundred one billion, one hundred twenty million, twenty-one thousand, two hundred twelve".