2121100100012 has 24 divisors (see below), whose sum is σ = 3782194290000. Its totient is φ = 1040475623616.

The previous prime is 2121100099981. The next prime is 2121100100033. The reversal of 2121100100012 is 2100010011212.

It is a junction number, because it is equal to n+sod(n) for n = 2121100099966 and 2121100100002.

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 7 ways as a sum of consecutive naturals, for example, 3240614 + ... + 3839762.

It is an arithmetic number, because the mean of its divisors is an integer number (157591428750).

Almost surely, 2^{2121100100012} is an apocalyptic number.

It is an amenable number.

2121100100012 is a deficient number, since it is larger than the sum of its proper divisors (1661094189988).

2121100100012 is a wasteful number, since it uses less digits than its factorization.

2121100100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615905 (or 615903 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2121100100012 its reverse (2100010011212), we get a palindrome (4221110111224).

The spelling of 2121100100012 in words is "two trillion, one hundred twenty-one billion, one hundred million, one hundred thousand, twelve".