120121212020221 has 4 divisors (see below), whose sum is σ = 120184201645632. Its totient is φ = 120058222394812.

The previous prime is 120121212020191. The next prime is 120121212020269. The reversal of 120121212020221 is 122020212121021.

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 120121212020221 - 2¹⁵ = 120121211987453 is a prime.

It is a super-2 number, since 2×120121212020221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121212020321) 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, 31494809845 + ... + 31494813658.

It is an arithmetic number, because the mean of its divisors is an integer number (30046050411408).

Almost surely, 2^{120121212020221} is an apocalyptic number.

It is an amenable number.

120121212020221 is a deficient number, since it is larger than the sum of its proper divisors (62989625411).

120121212020221 is an equidigital number, since it uses as much as digits as its factorization.

120121212020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62989625410.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 120121212020221 its reverse (122020212121021), we get a palindrome (242141424141242).

The spelling of 120121212020221 in words is "one hundred twenty trillion, one hundred twenty-one billion, two hundred twelve million, twenty thousand, two hundred twenty-one".