120120100021 has 8 divisors (see below), whose sum is σ = 121521917088. Its totient is φ = 118722450000.

The previous prime is 120120100019. The next prime is 120120100031. The reversal of 120120100021 is 120001021021.

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 120120100021 - 2¹ = 120120100019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120120099980 and 120120100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120120100031) 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, 983755 + ... + 1099096.

It is an arithmetic number, because the mean of its divisors is an integer number (15190239636).

Almost surely, 2^120120100021 is an apocalyptic number.

It is an amenable number.

120120100021 is a deficient number, since it is larger than the sum of its proper divisors (1401817067).

120120100021 is a wasteful number, since it uses less digits than its factorization.

120120100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083523.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 120120100021 its reverse (120001021021), we get a palindrome (240121121042).

The spelling of 120120100021 in words is "one hundred twenty billion, one hundred twenty million, one hundred thousand, twenty-one".