10221211221111 has 24 divisors (see below), whose sum is σ = 16248683342736. Its totient is φ = 6139853341440.

The previous prime is 10221211221017. The next prime is 10221211221119. The reversal of 10221211221111 is 11112211212201.

It is a happy number.

10221211221111 is a `hidden beast` number, since 1 + 0 + 221 + 211 + 221 + 1 + 11 = 666.

It is not a de Polignac number, because 10221211221111 - 2⁴² = 5823164710007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221211221119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 456823140 + ... + 456845513.

It is an arithmetic number, because the mean of its divisors is an integer number (677028472614).

Almost surely, 2^{10221211221111} is an apocalyptic number.

10221211221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10221211221111 is a deficient number, since it is larger than the sum of its proper divisors (6027472121625).

10221211221111 is a wasteful number, since it uses less digits than its factorization.

10221211221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913668783 (or 913668780 counting only the distinct ones).

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

Adding to 10221211221111 its reverse (11112211212201), we get a palindrome (21333422433312).

The spelling of 10221211221111 in words is "ten trillion, two hundred twenty-one billion, two hundred eleven million, two hundred twenty-one thousand, one hundred eleven".