12121012 has 24 divisors (see below), whose sum is σ = 22853600. Its totient is φ = 5606496.

The previous prime is 12121009. The next prime is 12121061. The reversal of 12121012 is 21012121.

12121012 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12121012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414 + ... + 5122.

Almost surely, 2^12121012 is an apocalyptic number.

It is an amenable number.

12121012 is a deficient number, since it is larger than the sum of its proper divisors (10732588).

12121012 is a wasteful number, since it uses less digits than its factorization.

12121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775 (or 3773 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 12121012 is about 3481.5243787743. The cubic root of 12121012 is about 229.7098546771.

Adding to 12121012 its reverse (21012121), we get a palindrome (33133133).

It can be divided in two parts, 121 and 21012, that multiplied together give a palindrome (2542452).

The spelling of 12121012 in words is "twelve million, one hundred twenty-one thousand, twelve".