10211221122111 has 32 divisors (see below), whose sum is σ = 15214684051200. Its totient is φ = 6768418436640.

The previous prime is 10211221122107. The next prime is 10211221122143. The reversal of 10211221122111 is 11122112211201.

It is a happy number.

10211221122111 is a `hidden beast` number, since 1 + 0 + 211 + 221 + 1 + 221 + 11 = 666.

It is not a de Polignac number, because 10211221122111 - 2² = 10211221122107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211221122611) 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 31 ways as a sum of consecutive naturals, for example, 4781020 + ... + 6578798.

It is an arithmetic number, because the mean of its divisors is an integer number (475458876600).

Almost surely, 2^{10211221122111} is an apocalyptic number.

10211221122111 is a deficient number, since it is larger than the sum of its proper divisors (5003462929089).

10211221122111 is a wasteful number, since it uses less digits than its factorization.

10211221122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798996 (or 1798990 counting only the distinct ones).

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

Adding to 10211221122111 its reverse (11122112211201), we get a palindrome (21333333333312).

The spelling of 10211221122111 in words is "ten trillion, two hundred eleven billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred eleven".