10211221222111 has 24 divisors (see below), whose sum is σ = 12810809131344. Its totient is φ = 8067378654720.

The previous prime is 10211221222091. The next prime is 10211221222117. The reversal of 10211221222111 is 11122212211201.

It is a happy number.

It is not a de Polignac number, because 10211221222111 - 2²⁵ = 10211187667679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211221222117) 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, 11300050 + ... + 12170191.

It is an arithmetic number, because the mean of its divisors is an integer number (533783713806).

Almost surely, 2^{10211221222111} is an apocalyptic number.

10211221222111 is a deficient number, since it is larger than the sum of its proper divisors (2599587909233).

10211221222111 is a wasteful number, since it uses less digits than its factorization.

10211221222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23470951 (or 23470944 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 10211221222111 its reverse (11122212211201), we get a palindrome (21333433433312).

The spelling of 10211221222111 in words is "ten trillion, two hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".