12121100022000 has 80 divisors (see below), whose sum is σ = 39078426490272. Its totient is φ = 3232293337600.

The previous prime is 12121100021993. The next prime is 12121100022013. The reversal of 12121100022000 is 22000112121.

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

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 1010085669 + ... + 1010097668.

Almost surely, 2^{12121100022000} is an apocalyptic number.

12121100022000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121100022000 is an abundant number, since it is smaller than the sum of its proper divisors (26957326468272).

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

12121100022000 is a wasteful number, since it uses less digits than its factorization.

12121100022000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020183363 (or 2020183347 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12121100022000 its reverse (22000112121), we get a palindrome (12143100134121).

The spelling of 12121100022000 in words is "twelve trillion, one hundred twenty-one billion, one hundred million, twenty-two thousand".