120002121012221 has 8 divisors (see below), whose sum is σ = 137149458729984. Its totient is φ = 102855827687760.

The previous prime is 120002121012121. The next prime is 120002121012227. The reversal of 120002121012221 is 122210121200021.

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

It is not a de Polignac number, because 120002121012221 - 2¹⁰ = 120002121011197 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 120002121012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120002121012227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260852090 + ... + 261311723.

It is an arithmetic number, because the mean of its divisors is an integer number (17143682341248).

Almost surely, 2^{120002121012221} is an apocalyptic number.

It is an amenable number.

120002121012221 is a deficient number, since it is larger than the sum of its proper divisors (17147337717763).

120002121012221 is an equidigital number, since it uses as much as digits as its factorization.

120002121012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522196651.

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

Adding to 120002121012221 its reverse (122210121200021), we get a palindrome (242212242212242).

The spelling of 120002121012221 in words is "one hundred twenty trillion, two billion, one hundred twenty-one million, twelve thousand, two hundred twenty-one".