2100121211112 has 32 divisors (see below), whose sum is σ = 5250774196800. Its totient is φ = 699977581184.

The previous prime is 2100121211087. The next prime is 2100121211233. The reversal of 2100121211112 is 2111121210012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2100121211091 and 2100121211100.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3653013 + ... + 4188644.

It is an arithmetic number, because the mean of its divisors is an integer number (164086693650).

Almost surely, 2^{2100121211112} is an apocalyptic number.

It is an amenable number.

2100121211112 is an abundant number, since it is smaller than the sum of its proper divisors (3150652985688).

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

2100121211112 is a wasteful number, since it uses less digits than its factorization.

2100121211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7852825 (or 7852821 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2100121211112 its reverse (2111121210012), we get a palindrome (4211242421124).

The spelling of 2100121211112 in words is "two trillion, one hundred billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twelve".