120666021 has 8 divisors (see below), whose sum is σ = 183872064. Its totient is φ = 68952000.

The previous prime is 120666019. The next prime is 120666053.

120666021 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 120666021 - 2¹ = 120666019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120665982 and 120666000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120666421) 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, 2872980 + ... + 2873021.

It is an arithmetic number, because the mean of its divisors is an integer number (22984008).

Almost surely, 2^120666021 is an apocalyptic number.

It is an amenable number.

120666021 is a deficient number, since it is larger than the sum of its proper divisors (63206043).

120666021 is an equidigital number, since it uses as much as digits as its factorization.

120666021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5746011.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 120666021 is about 10984.8086464899. The cubic root of 120666021 is about 494.1532590638.

It can be divided in two parts, 1206660 and 21, that added together give a triangular number (1206681 = T₁₅₅₃).

The spelling of 120666021 in words is "one hundred twenty million, six hundred sixty-six thousand, twenty-one".