2100120212 has 12 divisors (see below), whose sum is σ = 3703266336. Its totient is φ = 1042044120.

The previous prime is 2100120157. The next prime is 2100120221. The reversal of 2100120212 is 2120210012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2100120193 and 2100120202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2003408 + ... + 2004455.

It is an arithmetic number, because the mean of its divisors is an integer number (308605528).

Almost surely, 2^2100120212 is an apocalyptic number.

It is an amenable number.

2100120212 is a deficient number, since it is larger than the sum of its proper divisors (1603146124).

2100120212 is a wasteful number, since it uses less digits than its factorization.

2100120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007998 (or 4007996 counting only the distinct ones).

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

The square root of 2100120212 is about 45827.0685512395. The cubic root of 2100120212 is about 1280.6035995979.

Adding to 2100120212 its reverse (2120210012), we get a palindrome (4220330224).

The spelling of 2100120212 in words is "two billion, one hundred million, one hundred twenty thousand, two hundred twelve".