101212121222111 has 8 divisors (see below), whose sum is σ = 106599682329984. Its totient is φ = 95906812955800.

The previous prime is 101212121222077. The next prime is 101212121222117. The reversal of 101212121222111 is 111222121212101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101212121222111 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 (101212121222117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20563207865 + ... + 20563212786.

It is an arithmetic number, because the mean of its divisors is an integer number (13324960291248).

Almost surely, 2^{101212121222111} is an apocalyptic number.

101212121222111 is a deficient number, since it is larger than the sum of its proper divisors (5387561107873).

101212121222111 is a wasteful number, since it uses less digits than its factorization.

101212121222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41126420781.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 101212121222111 its reverse (111222121212101), we get a palindrome (212434242434212).

The spelling of 101212121222111 in words is "one hundred one trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".