10221212012111 has 4 divisors (see below), whose sum is σ = 10311665215872. Its totient is φ = 10130758808352.

The previous prime is 10221212012093. The next prime is 10221212012117. The reversal of 10221212012111 is 11121021212201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10221212012111 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 10221212012111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221212012117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45226601711 + ... + 45226601936.

It is an arithmetic number, because the mean of its divisors is an integer number (2577916303968).

Almost surely, 2^{10221212012111} is an apocalyptic number.

10221212012111 is a deficient number, since it is larger than the sum of its proper divisors (90453203761).

10221212012111 is an equidigital number, since it uses as much as digits as its factorization.

10221212012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90453203760.

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

Adding to 10221212012111 its reverse (11121021212201), we get a palindrome (21342233224312).

The spelling of 10221212012111 in words is "ten trillion, two hundred twenty-one billion, two hundred twelve million, twelve thousand, one hundred eleven".