12201212112 has 20 divisors (see below), whose sum is σ = 31519798080. Its totient is φ = 4067070688.

The previous prime is 12201212087. The next prime is 12201212113. The reversal of 12201212112 is 21121210221.

It is a junction number, because it is equal to n+sod(n) for n = 12201212091 and 12201212100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201212113) 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, 127095912 + ... + 127096007.

It is an arithmetic number, because the mean of its divisors is an integer number (1575989904).

Almost surely, 2^12201212112 is an apocalyptic number.

12201212112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12201212112 is an abundant number, since it is smaller than the sum of its proper divisors (19318585968).

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

12201212112 is a wasteful number, since it uses less digits than its factorization.

12201212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254191930 (or 254191924 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12201212112 its reverse (21121210221), we get a palindrome (33322422333).

The spelling of 12201212112 in words is "twelve billion, two hundred one million, two hundred twelve thousand, one hundred twelve".