10011021212121 has 16 divisors (see below), whose sum is σ = 14234884171200. Its totient is φ = 6236234961408.

The previous prime is 10011021212119. The next prime is 10011021212147. The reversal of 10011021212121 is 12121212011001.

It is a happy number.

It is not a de Polignac number, because 10011021212121 - 2¹ = 10011021212119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10011021212121.

It is not an unprimeable number, because it can be changed into a prime (10011021212161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 706088356 + ... + 706102533.

It is an arithmetic number, because the mean of its divisors is an integer number (889680260700).

Almost surely, 2^{10011021212121} is an apocalyptic number.

It is an amenable number.

10011021212121 is a deficient number, since it is larger than the sum of its proper divisors (4223862959079).

10011021212121 is a wasteful number, since it uses less digits than its factorization.

10011021212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412191048.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10011021212121 its reverse (12121212011001), we get a palindrome (22132233223122).

The spelling of 10011021212121 in words is "ten trillion, eleven billion, twenty-one million, two hundred twelve thousand, one hundred twenty-one".