101112210221221 has 4 divisors (see below), whose sum is σ = 101112232247244. Its totient is φ = 101112188195200.

The previous prime is 101112210221167. The next prime is 101112210221273. The reversal of 101112210221221 is 122122012211101.

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 52468364685025 + 48643845536196 = 7243505^2 + 6974514^2 .

It is a cyclic number.

It is not a de Polignac number, because 101112210221221 - 2³⁵ = 101077850482853 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 (101112210221291) 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, 1230850 + ... + 14273731.

It is an arithmetic number, because the mean of its divisors is an integer number (25278058061811).

Almost surely, 2^{101112210221221} is an apocalyptic number.

It is an amenable number.

101112210221221 is a deficient number, since it is larger than the sum of its proper divisors (22026023).

101112210221221 is an equidigital number, since it uses as much as digits as its factorization.

101112210221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22026022.

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

Adding to 101112210221221 its reverse (122122012211101), we get a palindrome (223234222432322).

The spelling of 101112210221221 in words is "one hundred one trillion, one hundred twelve billion, two hundred ten million, two hundred twenty-one thousand, two hundred twenty-one".