101112212221021 has 4 divisors (see below), whose sum is σ = 101112579482044. Its totient is φ = 101111844960000.

The previous prime is 101112212220997. The next prime is 101112212221049. The reversal of 101112212221021 is 120122212211101.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36247792936996 + 64864419284025 = 6020614^2 + 8053845^2 .

It is a cyclic number.

It is not a de Polignac number, because 101112212221021 - 2¹⁹ = 101112211696733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101112212221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101112212221921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183217230 + ... + 183768271.

It is an arithmetic number, because the mean of its divisors is an integer number (25278144870511).

Almost surely, 2^{101112212221021} is an apocalyptic number.

It is an amenable number.

101112212221021 is a deficient number, since it is larger than the sum of its proper divisors (367261023).

101112212221021 is an equidigital number, since it uses as much as digits as its factorization.

101112212221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367261022.

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

Adding to 101112212221021 its reverse (120122212211101), we get a palindrome (221234424432122).

The spelling of 101112212221021 in words is "one hundred one trillion, one hundred twelve billion, two hundred twelve million, two hundred twenty-one thousand, twenty-one".