221330101302121 has 4 divisors (see below), whose sum is σ = 252948687202432. Its totient is φ = 189711515401812.

The previous prime is 221330101302059. The next prime is 221330101302133. The reversal of 221330101302121 is 121203101033122.

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.

It is a cyclic number.

It is not a de Polignac number, because 221330101302121 - 2¹³ = 221330101293929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221330101302092 and 221330101302101.

It is not an unprimeable number, because it can be changed into a prime (221330101305121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15809292950145 + ... + 15809292950158.

It is an arithmetic number, because the mean of its divisors is an integer number (63237171800608).

Almost surely, 2^{221330101302121} is an apocalyptic number.

It is an amenable number.

221330101302121 is a deficient number, since it is larger than the sum of its proper divisors (31618585900311).

221330101302121 is an equidigital number, since it uses as much as digits as its factorization.

221330101302121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31618585900310.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 221330101302121 its reverse (121203101033122), we get a palindrome (342533202335243).

The spelling of 221330101302121 in words is "two hundred twenty-one trillion, three hundred thirty billion, one hundred one million, three hundred two thousand, one hundred twenty-one".