10212121022111 has 4 divisors (see below), whose sum is σ = 10232586195000. Its totient is φ = 10191655849224.

The previous prime is 10212121022071. The next prime is 10212121022141. The reversal of 10212121022111 is 11122012121201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10212121022111 - 2²² = 10212116827807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10212121022111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212121022141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10232585696 + ... + 10232586693.

It is an arithmetic number, because the mean of its divisors is an integer number (2558146548750).

Almost surely, 2^{10212121022111} is an apocalyptic number.

10212121022111 is a deficient number, since it is larger than the sum of its proper divisors (20465172889).

10212121022111 is an equidigital number, since it uses as much as digits as its factorization.

10212121022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20465172888.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 10212121022111 its reverse (11122012121201), we get a palindrome (21334133143312).

The spelling of 10212121022111 in words is "ten trillion, two hundred twelve billion, one hundred twenty-one million, twenty-two thousand, one hundred eleven".