2102120012 has 24 divisors (see below), whose sum is σ = 3713472000. Its totient is φ = 1041166976.

The previous prime is 2102120011. The next prime is 2102120017. The reversal of 2102120012 is 2100212012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2102119975 and 2102120002.

It is not an unprimeable number, because it can be changed into a prime (2102120011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223664 + ... + 232872.

It is an arithmetic number, because the mean of its divisors is an integer number (154728000).

Almost surely, 2^2102120012 is an apocalyptic number.

It is an amenable number.

2102120012 is a deficient number, since it is larger than the sum of its proper divisors (1611351988).

2102120012 is a wasteful number, since it uses less digits than its factorization.

2102120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9745 (or 9743 counting only the distinct ones).

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

The square root of 2102120012 is about 45848.8823418848. The cubic root of 2102120012 is about 1281.0099475490.

Adding to 2102120012 its reverse (2100212012), we get a palindrome (4202332024).

The spelling of 2102120012 in words is "two billion, one hundred two million, one hundred twenty thousand, twelve".