20121210112 has 36 divisors (see below), whose sum is σ = 40215258496. Its totient is φ = 10047720960.

The previous prime is 20121210089. The next prime is 20121210113. The reversal of 20121210112 is 21101212102.

It is a junction number, because it is equal to n+sod(n) for n = 20121210092 and 20121210101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121210113) 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, 151537 + ... + 251407.

Almost surely, 2^20121210112 is an apocalyptic number.

It is an amenable number.

20121210112 is a deficient number, since it is larger than the sum of its proper divisors (20094048384).

20121210112 is an frugal number, since it uses more digits than its factorization.

20121210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100674 (or 100660 counting only the distinct ones).

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

Adding to 20121210112 its reverse (21101212102), we get a palindrome (41222422214).

The spelling of 20121210112 in words is "twenty billion, one hundred twenty-one million, two hundred ten thousand, one hundred twelve".