12101220112 has 20 divisors (see below), whose sum is σ = 23661219340. Its totient is φ = 5995099008.

The previous prime is 12101220091. The next prime is 12101220119. The reversal of 12101220112 is 21102210121.

It can be written as a sum of positive squares in 2 ways, for example, as 10896019456 + 1205200656 = 104384^2 + 34716^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12101220092 and 12101220101.

It is not an unprimeable number, because it can be changed into a prime (12101220119) 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, 3467643 + ... + 3471130.

It is an arithmetic number, because the mean of its divisors is an integer number (1183060967).

Almost surely, 2^12101220112 is an apocalyptic number.

It is an amenable number.

12101220112 is a deficient number, since it is larger than the sum of its proper divisors (11559999228).

12101220112 is a wasteful number, since it uses less digits than its factorization.

12101220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6938890 (or 6938884 counting only the distinct ones).

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

Adding to 12101220112 its reverse (21102210121), we get a palindrome (33203430233).

Subtracting 12101220112 from its reverse (21102210121), we obtain a palindrome (9000990009).

The spelling of 12101220112 in words is "twelve billion, one hundred one million, two hundred twenty thousand, one hundred twelve".