12121112222000 has 80 divisors (see below), whose sum is σ = 29309801508000. Its totient is φ = 4848287379200.

The previous prime is 12121112221997. The next prime is 12121112222059. The reversal of 12121112222000 is 22221112121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×12121112222000² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12121112222000.

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, 76298651 + ... + 76457349.

It is an arithmetic number, because the mean of its divisors is an integer number (366372518850).

Almost surely, 2^{12121112222000} is an apocalyptic number.

12121112222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121112222000 is an abundant number, since it is smaller than the sum of its proper divisors (17188689286000).

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

12121112222000 is a wasteful number, since it uses less digits than its factorization.

12121112222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196911 (or 196895 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12121112222000 its reverse (22221112121), we get a palindrome (12143333334121).

The spelling of 12121112222000 in words is "twelve trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty-two thousand".