120121221 has 8 divisors (see below), whose sum is σ = 174721824. Its totient is φ = 72800720.

The previous prime is 120121207. The next prime is 120121229. The reversal of 120121221 is 122121021.

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 120121221 - 2⁷ = 120121093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120121197 and 120121206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121229) 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, 1819986 + ... + 1820051.

It is an arithmetic number, because the mean of its divisors is an integer number (21840228).

Almost surely, 2^120121221 is an apocalyptic number.

120121221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120121221 is a deficient number, since it is larger than the sum of its proper divisors (54600603).

120121221 is a wasteful number, since it uses less digits than its factorization.

120121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640051.

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

The square root of 120121221 is about 10959.9827098404. The cubic root of 120121221 is about 493.4084460239.

Adding to 120121221 its reverse (122121021), we get a palindrome (242242242).

It can be divided in two parts, 1201 and 21221, that added together give a palindrome (22422).

The spelling of 120121221 in words is "one hundred twenty million, one hundred twenty-one thousand, two hundred twenty-one".