101212311221 has 8 divisors (see below), whose sum is σ = 116252476800. Its totient is φ = 86317461648.

The previous prime is 101212311209. The next prime is 101212311223. The reversal of 101212311221 is 122113212101.

It is a happy number.

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 101212311221 - 2¹⁸ = 101212049077 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 101212311221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101212311223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36327506 + ... + 36330291.

It is an arithmetic number, because the mean of its divisors is an integer number (14531559600).

Almost surely, 2^101212311221 is an apocalyptic number.

It is an amenable number.

101212311221 is a deficient number, since it is larger than the sum of its proper divisors (15040165579).

101212311221 is an equidigital number, since it uses as much as digits as its factorization.

101212311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72658003.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 101212311221 its reverse (122113212101), we get a palindrome (223325523322).

The spelling of 101212311221 in words is "one hundred one billion, two hundred twelve million, three hundred eleven thousand, two hundred twenty-one".