120121121221 has 8 divisors (see below), whose sum is σ = 123334152480. Its totient is φ = 116927158992.

The previous prime is 120121121201. The next prime is 120121121251. The reversal of 120121121221 is 122121121021.

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 120121121221 - 2¹³ = 120121113029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120121121195 and 120121121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121121201) 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, 4754491 + ... + 4779688.

It is an arithmetic number, because the mean of its divisors is an integer number (15416769060).

Almost surely, 2^120121121221 is an apocalyptic number.

It is an amenable number.

120121121221 is a deficient number, since it is larger than the sum of its proper divisors (3213031259).

120121121221 is an equidigital number, since it uses as much as digits as its factorization.

120121121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9534515.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 120121121221 its reverse (122121121021), we get a palindrome (242242242242).

The spelling of 120121121221 in words is "one hundred twenty billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".