1212100022000 has 160 divisors (see below), whose sum is σ = 3525844807680. Its totient is φ = 393704582400.

The previous prime is 1212100021999. The next prime is 1212100022033. The reversal of 1212100022000 is 2200012121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2012384 + ... + 2544383.

It is an arithmetic number, because the mean of its divisors is an integer number (22036530048).

Almost surely, 2^{1212100022000} is an apocalyptic number.

1212100022000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212100022000 is an abundant number, since it is smaller than the sum of its proper divisors (2313744785680).

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

1212100022000 is a wasteful number, since it uses less digits than its factorization.

1212100022000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556816 (or 4556800 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1212100022000 its reverse (2200012121), we get a palindrome (1214300034121).

The spelling of 1212100022000 in words is "one trillion, two hundred twelve billion, one hundred million, twenty-two thousand".