2100021112012 has 48 divisors (see below), whose sum is σ = 3907149281280. Its totient is φ = 984847550400.

The previous prime is 2100021112009. The next prime is 2100021112019. The reversal of 2100021112012 is 2102111200012.

It is a super-2 number, since 2×2100021112012² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2100021111983 and 2100021112001.

It is not an unprimeable number, because it can be changed into a prime (2100021112019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2720058 + ... + 3405694.

It is an arithmetic number, because the mean of its divisors is an integer number (81398943360).

Almost surely, 2^{2100021112012} is an apocalyptic number.

It is an amenable number.

2100021112012 is a deficient number, since it is larger than the sum of its proper divisors (1807128169268).

2100021112012 is a wasteful number, since it uses less digits than its factorization.

2100021112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686062 (or 686060 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2100021112012 its reverse (2102111200012), we get a palindrome (4202132312024).

The spelling of 2100021112012 in words is "two trillion, one hundred billion, twenty-one million, one hundred twelve thousand, twelve".