101212020201221 has 8 divisors (see below), whose sum is σ = 101267177458200. Its totient is φ = 101156868652032.

The previous prime is 101212020201203. The next prime is 101212020201241. The reversal of 101212020201221 is 122102020212101.

It can be written as a sum of positive squares in 4 ways, for example, as 701590512100 + 100510429689121 = 837610^2 + 10025489^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 101212020201221 - 2²² = 101212016006917 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 101212020201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101212020201241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34290605 + ... + 37125053.

It is an arithmetic number, because the mean of its divisors is an integer number (12658397182275).

Almost surely, 2^{101212020201221} is an apocalyptic number.

It is an amenable number.

101212020201221 is a deficient number, since it is larger than the sum of its proper divisors (55157256979).

101212020201221 is a wasteful number, since it uses less digits than its factorization.

101212020201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853895.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 101212020201221 its reverse (122102020212101), we get a palindrome (223314040413322).

The spelling of 101212020201221 in words is "one hundred one trillion, two hundred twelve billion, twenty million, two hundred one thousand, two hundred twenty-one".