10122221212111 has 4 divisors (see below), whose sum is σ = 10717645989312. Its totient is φ = 9526796434912.

The previous prime is 10122221212067. The next prime is 10122221212123. The reversal of 10122221212111 is 11121212222101.

It is a happy number.

10122221212111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10122221212111 - 2¹⁷ = 10122221081039 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 (10122221212141) 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, 297712388575 + ... + 297712388608.

It is an arithmetic number, because the mean of its divisors is an integer number (2679411497328).

Almost surely, 2^{10122221212111} is an apocalyptic number.

10122221212111 is a deficient number, since it is larger than the sum of its proper divisors (595424777201).

10122221212111 is an equidigital number, since it uses as much as digits as its factorization.

10122221212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595424777200.

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

Adding to 10122221212111 its reverse (11121212222101), we get a palindrome (21243433434212).

The spelling of 10122221212111 in words is "ten trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred eleven".