101212221201111 has 24 divisors (see below), whose sum is σ = 148769955425520. Its totient is φ = 66296771424000.

The previous prime is 101212221201107. The next prime is 101212221201173. The reversal of 101212221201111 is 111102122212101.

It is a happy number.

101212221201111 is a `hidden beast` number, since 10 + 121 + 2 + 221 + 201 + 111 = 666.

It is not a de Polignac number, because 101212221201111 - 2² = 101212221201107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101212221205111) 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, 424860226 + ... + 425098383.

It is an arithmetic number, because the mean of its divisors is an integer number (6198748142730).

Almost surely, 2^{101212221201111} is an apocalyptic number.

101212221201111 is a deficient number, since it is larger than the sum of its proper divisors (47557734224409).

101212221201111 is a wasteful number, since it uses less digits than its factorization.

101212221201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849958847 (or 849958844 counting only the distinct ones).

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

Adding to 101212221201111 its reverse (111102122212101), we get a palindrome (212314343413212).

The spelling of 101212221201111 in words is "one hundred one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred one thousand, one hundred eleven".