120221100001221 has 4 divisors (see below), whose sum is σ = 160294800001632. Its totient is φ = 80147400000812.

The previous prime is 120221100001213. The next prime is 120221100001319. The reversal of 120221100001221 is 122100001122021.

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 120221100001221 - 2³ = 120221100001213 is a prime.

It is a super-2 number, since 2×120221100001221² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 120221100001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221100001921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20036850000201 + ... + 20036850000206.

It is an arithmetic number, because the mean of its divisors is an integer number (40073700000408).

Almost surely, 2^{120221100001221} is an apocalyptic number.

It is an amenable number.

120221100001221 is a deficient number, since it is larger than the sum of its proper divisors (40073700000411).

120221100001221 is an equidigital number, since it uses as much as digits as its factorization.

120221100001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40073700000410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 120221100001221 its reverse (122100001122021), we get a palindrome (242321101123242).

The spelling of 120221100001221 in words is "one hundred twenty trillion, two hundred twenty-one billion, one hundred million, one thousand, two hundred twenty-one".