101212123321 has 16 divisors (see below), whose sum is σ = 113168914560. Its totient is φ = 89954599680.

The previous prime is 101212123289. The next prime is 101212123349. The reversal of 101212123321 is 123321212101.

It is not a de Polignac number, because 101212123321 - 2⁵ = 101212123289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101212123361) 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 15 ways as a sum of consecutive naturals, for example, 403326 + ... + 604231.

It is an arithmetic number, because the mean of its divisors is an integer number (7073057160).

Almost surely, 2^101212123321 is an apocalyptic number.

It is an amenable number.

101212123321 is a deficient number, since it is larger than the sum of its proper divisors (11956791239).

101212123321 is a wasteful number, since it uses less digits than its factorization.

101212123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007904.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 101212123321 its reverse (123321212101), we get a palindrome (224533335422).

The spelling of 101212123321 in words is "one hundred one billion, two hundred twelve million, one hundred twenty-three thousand, three hundred twenty-one".