2100021122012 has 144 divisors (see below), whose sum is σ = 4325271664896. Its totient is φ = 881711424000.

The previous prime is 2100021122011. The next prime is 2100021122039. The reversal of 2100021122012 is 2102211200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100021122011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1044266087 + ... + 1044268097.

It is an arithmetic number, because the mean of its divisors is an integer number (30036608784).

Almost surely, 2^{2100021122012} is an apocalyptic number.

2100021122012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2100021122012 is an abundant number, since it is smaller than the sum of its proper divisors (2225250542884).

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

2100021122012 is a wasteful number, since it uses less digits than its factorization.

2100021122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488 (or 2419 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2100021122012 its reverse (2102211200012), we get a palindrome (4202232322024).

The spelling of 2100021122012 in words is "two trillion, one hundred billion, twenty-one million, one hundred twenty-two thousand, twelve".