12101221012 has 48 divisors (see below), whose sum is σ = 22666355712. Its totient is φ = 5639025920.

The previous prime is 12101220953. The next prime is 12101221021. The reversal of 12101221012 is 21012210121.

12101221012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12101220983 and 12101221001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3819453 + ... + 3822619.

It is an arithmetic number, because the mean of its divisors is an integer number (472215744).

Almost surely, 2^12101221012 is an apocalyptic number.

It is an amenable number.

12101221012 is a deficient number, since it is larger than the sum of its proper divisors (10565134700).

12101221012 is a wasteful number, since it uses less digits than its factorization.

12101221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248 (or 4246 counting only the distinct ones).

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

Adding to 12101221012 its reverse (21012210121), we get a palindrome (33113431133).

The spelling of 12101221012 in words is "twelve billion, one hundred one million, two hundred twenty-one thousand, twelve".