12121001012 has 12 divisors (see below), whose sum is σ = 22134002016. Its totient is φ = 5797000440.

The previous prime is 12121000993. The next prime is 12121001017. The reversal of 12121001012 is 21010012121.

It is a junction number, because it is equal to n+sod(n) for n = 12121000984 and 12121001002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121001017) 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, 65874914 + ... + 65875097.

It is an arithmetic number, because the mean of its divisors is an integer number (1844500168).

Almost surely, 2^12121001012 is an apocalyptic number.

It is an amenable number.

12121001012 is a deficient number, since it is larger than the sum of its proper divisors (10013001004).

12121001012 is a wasteful number, since it uses less digits than its factorization.

12121001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131750038 (or 131750036 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12121001012 its reverse (21010012121), we get a palindrome (33131013133).

The spelling of 12121001012 in words is "twelve billion, one hundred twenty-one million, one thousand, twelve".