10121221121212 has 12 divisors (see below), whose sum is σ = 17722357480296. Its totient is φ = 5057690412560.

The previous prime is 10121221121191. The next prime is 10121221121239. The reversal of 10121221121212 is 21212112212101.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 10121221121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730029214 + ... + 730043077.

It is an arithmetic number, because the mean of its divisors is an integer number (1476863123358).

Almost surely, 2^{10121221121212} is an apocalyptic number.

It is an amenable number.

10121221121212 is a deficient number, since it is larger than the sum of its proper divisors (7601136359084).

10121221121212 is a wasteful number, since it uses less digits than its factorization.

10121221121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460074028 (or 1460074026 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 10121221121212 its reverse (21212112212101), we get a palindrome (31333333333313).

The spelling of 10121221121212 in words is "ten trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".