2100120321 has 8 divisors (see below), whose sum is σ = 3015557440. Its totient is φ = 1292381712.

The previous prime is 2100120287. The next prime is 2100120329. The reversal of 2100120321 is 1230210012.

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

It is not a de Polignac number, because 2100120321 - 2¹⁵ = 2100087553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100120297 and 2100120306.

It is not an unprimeable number, because it can be changed into a prime (2100120329) 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, 26924581 + ... + 26924658.

It is an arithmetic number, because the mean of its divisors is an integer number (376944680).

Almost surely, 2^2100120321 is an apocalyptic number.

It is an amenable number.

2100120321 is a deficient number, since it is larger than the sum of its proper divisors (915437119).

2100120321 is a wasteful number, since it uses less digits than its factorization.

2100120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53849255.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2100120321 is about 45827.0697404929. The cubic root of 2100120321 is about 1280.6036217531.

Adding to 2100120321 its reverse (1230210012), we get a palindrome (3330330333).

The spelling of 2100120321 in words is "two billion, one hundred million, one hundred twenty thousand, three hundred twenty-one".