120000121221 has 16 divisors (see below), whose sum is σ = 162212825984. Its totient is φ = 78894031104.

The previous prime is 120000121211. The next prime is 120000121229. The reversal of 120000121221 is 122121000021.

It is not a de Polignac number, because 120000121221 - 2³⁵ = 85640382853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120000121197 and 120000121206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120000121229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1915425 + ... + 1977081.

It is an arithmetic number, because the mean of its divisors is an integer number (10138301624).

Almost surely, 2^120000121221 is an apocalyptic number.

It is an amenable number.

120000121221 is a deficient number, since it is larger than the sum of its proper divisors (42212704763).

120000121221 is an equidigital number, since it uses as much as digits as its factorization.

120000121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70620.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 120000121221 its reverse (122121000021), we get a palindrome (242121121242).

The spelling of 120000121221 in words is "one hundred twenty billion, one hundred twenty-one thousand, two hundred twenty-one".