10221211021111 has 4 divisors (see below), whose sum is σ = 10221221177424. Its totient is φ = 10221200864800.

The previous prime is 10221211021093. The next prime is 10221211021127. The reversal of 10221211021111 is 11112011212201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10221211021111 - 2³⁹ = 9671455207223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221211021811) 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, 3379075 + ... + 5644516.

It is an arithmetic number, because the mean of its divisors is an integer number (2555305294356).

Almost surely, 2^{10221211021111} is an apocalyptic number.

10221211021111 is a deficient number, since it is larger than the sum of its proper divisors (10156313).

10221211021111 is an equidigital number, since it uses as much as digits as its factorization.

10221211021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10156312.

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

Adding to 10221211021111 its reverse (11112011212201), we get a palindrome (21333222233312).

The spelling of 10221211021111 in words is "ten trillion, two hundred twenty-one billion, two hundred eleven million, twenty-one thousand, one hundred eleven".