10221221112111 has 8 divisors (see below), whose sum is σ = 15142549795760. Its totient is φ = 6814147408056.

The previous prime is 10221221112071. The next prime is 10221221112133. The reversal of 10221221112111 is 11121112212201.

It is a happy number.

10221221112111 is a `hidden beast` number, since 1 + 0 + 221 + 221 + 11 + 211 + 1 = 666.

It is not a de Polignac number, because 10221221112111 - 2¹⁵ = 10221221079343 is a prime.

It is a super-2 number, since 2×10221221112111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221221512111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189281872420 + ... + 189281872473.

It is an arithmetic number, because the mean of its divisors is an integer number (1892818724470).

Almost surely, 2^{10221221112111} is an apocalyptic number.

10221221112111 is a deficient number, since it is larger than the sum of its proper divisors (4921328683649).

10221221112111 is an equidigital number, since it uses as much as digits as its factorization.

10221221112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378563744902 (or 378563744896 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 10221221112111 its reverse (11121112212201), we get a palindrome (21342333324312).

The spelling of 10221221112111 in words is "ten trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, one hundred eleven".