12121102012 has 24 divisors (see below), whose sum is σ = 21336134400. Its totient is φ = 6025148976.

The previous prime is 12121101919. The next prime is 12121102033. The reversal of 12121102012 is 21020112121.

It is a super-2 number, since 2×12121102012² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12121101983 and 12121102001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581523 + ... + 602005.

It is an arithmetic number, because the mean of its divisors is an integer number (889005600).

Almost surely, 2^12121102012 is an apocalyptic number.

It is an amenable number.

12121102012 is a deficient number, since it is larger than the sum of its proper divisors (9215032388).

12121102012 is a wasteful number, since it uses less digits than its factorization.

12121102012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21345 (or 21343 counting only the distinct ones).

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

Adding to 12121102012 its reverse (21020112121), we get a palindrome (33141214133).

The spelling of 12121102012 in words is "twelve billion, one hundred twenty-one million, one hundred two thousand, twelve".