101212221001 has 4 divisors (see below), whose sum is σ = 101483567812. Its totient is φ = 100940874192.

The previous prime is 101212220939. The next prime is 101212221043. The reversal of 101212221001 is 100122212101.

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 53010457600 + 48201763401 = 230240^2 + 219549^2 .

It is a cyclic number.

It is not a de Polignac number, because 101212221001 - 2¹¹ = 101212218953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101212221091) 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, 135672846 + ... + 135673591.

It is an arithmetic number, because the mean of its divisors is an integer number (25370891953).

Almost surely, 2^101212221001 is an apocalyptic number.

It is an amenable number.

101212221001 is a deficient number, since it is larger than the sum of its proper divisors (271346811).

101212221001 is an equidigital number, since it uses as much as digits as its factorization.

101212221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271346810.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 101212221001 its reverse (100122212101), we get a palindrome (201334433102).

The spelling of 101212221001 in words is "one hundred one billion, two hundred twelve million, two hundred twenty-one thousand, one".