20121120120221 has 8 divisors (see below), whose sum is σ = 20141951737344. Its totient is φ = 20100292771680.

The previous prime is 20121120120203. The next prime is 20121120120301. The reversal of 20121120120221 is 12202102112102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20121120120221 - 2¹⁴ = 20121120103837 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 20121120120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121120120121) 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 7 ways as a sum of consecutive naturals, for example, 8408786 + ... + 10533276.

It is an arithmetic number, because the mean of its divisors is an integer number (2517743967168).

Almost surely, 2^{20121120120221} is an apocalyptic number.

It is an amenable number.

20121120120221 is a deficient number, since it is larger than the sum of its proper divisors (20831617123).

20121120120221 is a wasteful number, since it uses less digits than its factorization.

20121120120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134291.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20121120120221 its reverse (12202102112102), we get a palindrome (32323222232323).

The spelling of 20121120120221 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twenty thousand, two hundred twenty-one".