120961221 has 16 divisors (see below), whose sum is σ = 165494784. Its totient is φ = 78550704.

The previous prime is 120961213. The next prime is 120961223. The reversal of 120961221 is 122169021.

It is not a de Polignac number, because 120961221 - 2³ = 120961213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120961191 and 120961200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120961223) 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, 29520 + ... + 33366.

It is an arithmetic number, because the mean of its divisors is an integer number (10343424).

Almost surely, 2^120961221 is an apocalyptic number.

It is an amenable number.

120961221 is a deficient number, since it is larger than the sum of its proper divisors (44533563).

120961221 is a wasteful number, since it uses less digits than its factorization.

120961221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4120.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 120961221 is about 10998.2371769298. The cubic root of 120961221 is about 494.5559000221. Note that the first 3 decimals are identical.

The spelling of 120961221 in words is "one hundred twenty million, nine hundred sixty-one thousand, two hundred twenty-one".