2101212112 has 20 divisors (see below), whose sum is σ = 4098064096. Its totient is φ = 1043647200.

The previous prime is 2101212103. The next prime is 2101212119. The reversal of 2101212112 is 2112121012.

It is a junction number, because it is equal to n+sod(n) for n = 2101212092 and 2101212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101212119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432438 + ... + 437269.

Almost surely, 2^2101212112 is an apocalyptic number.

It is an amenable number.

2101212112 is a deficient number, since it is larger than the sum of its proper divisors (1996851984).

2101212112 is a wasteful number, since it uses less digits than its factorization.

2101212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869866 (or 869860 counting only the distinct ones).

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

The square root of 2101212112 is about 45838.9802678899. The cubic root of 2101212112 is about 1280.8254994044.

Adding to 2101212112 its reverse (2112121012), we get a palindrome (4213333124).

It can be divided in two parts, 21012 and 12112, that added together give a square (33124 = 182²).

The spelling of 2101212112 in words is "two billion, one hundred one million, two hundred twelve thousand, one hundred twelve".