12121211002112 has 18 divisors (see below), whose sum is σ = 24195073524258. Its totient is φ = 6060605500928.

The previous prime is 12121211002111. The next prime is 12121211002127. The reversal of 12121211002112 is 21120011212121.

It can be written as a sum of positive squares in only one way, i.e., 9679167210496 + 2442043791616 = 3111136^2 + 1562704^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121211002111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23674239983 + ... + 23674240494.

Almost surely, 2^{12121211002112} is an apocalyptic number.

It is an amenable number.

12121211002112 is a deficient number, since it is larger than the sum of its proper divisors (12073862522146).

12121211002112 is an frugal number, since it uses more digits than its factorization.

12121211002112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47348480493 (or 47348480479 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12121211002112 its reverse (21120011212121), we get a palindrome (33241222214233).

The spelling of 12121211002112 in words is "twelve trillion, one hundred twenty-one billion, two hundred eleven million, two thousand, one hundred twelve".