101212211321 has 8 divisors (see below), whose sum is σ = 113736799680. Its totient is φ = 89364627792.

The previous prime is 101212211311. The next prime is 101212211341. The reversal of 101212211321 is 123112212101.

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 a de Polignac number, because none of the positive numbers 2^k-101212211321 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 101212211321.

It is not an unprimeable number, because it can be changed into a prime (101212211311) 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, 169250891 + ... + 169251488.

It is an arithmetic number, because the mean of its divisors is an integer number (14217099960).

Almost surely, 2^101212211321 is an apocalyptic number.

It is an amenable number.

101212211321 is a deficient number, since it is larger than the sum of its proper divisors (12524588359).

101212211321 is a wasteful number, since it uses less digits than its factorization.

101212211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338502415.

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

Adding to 101212211321 its reverse (123112212101), we get a palindrome (224324423422).

The spelling of 101212211321 in words is "one hundred one billion, two hundred twelve million, two hundred eleven thousand, three hundred twenty-one".