101212010221111 has 4 divisors (see below), whose sum is σ = 101212030363752. Its totient is φ = 101211990078472.

The previous prime is 101212010221103. The next prime is 101212010221129. The reversal of 101212010221111 is 111122010212101.

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 101212010221111 - 2³ = 101212010221103 is a prime.

It is a super-4 number, since 4×101212010221111⁴ (a number of 57 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3, 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101212010221141) 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 3 ways as a sum of consecutive naturals, for example, 4332936 + ... + 14872738.

It is an arithmetic number, because the mean of its divisors is an integer number (25303007590938).

Almost surely, 2^{101212010221111} is an apocalyptic number.

101212010221111 is a deficient number, since it is larger than the sum of its proper divisors (20142641).

101212010221111 is an equidigital number, since it uses as much as digits as its factorization.

101212010221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20142640.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 101212010221111 its reverse (111122010212101), we get a palindrome (212334020433212).

The spelling of 101212010221111 in words is "one hundred one trillion, two hundred twelve billion, ten million, two hundred twenty-one thousand, one hundred eleven".