101212231321 has 4 divisors (see below), whose sum is σ = 101375741200. Its totient is φ = 101048721444.

The previous prime is 101212231313. The next prime is 101212231333. The reversal of 101212231321 is 123132212101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123132212101 = 17827 ⋅6907063.

It is a cyclic number.

It is not a de Polignac number, because 101212231321 - 2³ = 101212231313 is a prime.

It is a super-2 number, since 2×101212231321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101212231301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81754011 + ... + 81755248.

It is an arithmetic number, because the mean of its divisors is an integer number (25343935300).

Almost surely, 2^101212231321 is an apocalyptic number.

It is an amenable number.

101212231321 is a deficient number, since it is larger than the sum of its proper divisors (163509879).

101212231321 is an equidigital number, since it uses as much as digits as its factorization.

101212231321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163509878.

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

Adding to 101212231321 its reverse (123132212101), we get a palindrome (224344443422).

The spelling of 101212231321 in words is "one hundred one billion, two hundred twelve million, two hundred thirty-one thousand, three hundred twenty-one".