2102001321 has 8 divisors (see below), whose sum is σ = 3203049664. Its totient is φ = 1201143600.

The previous prime is 2102001313. The next prime is 2102001353. The reversal of 2102001321 is 1231002012.

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

It is not a de Polignac number, because 2102001321 - 2³ = 2102001313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102001297 and 2102001306.

It is not an unprimeable number, because it can be changed into a prime (2102006321) 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, 50047630 + ... + 50047671.

It is an arithmetic number, because the mean of its divisors is an integer number (400381208).

Almost surely, 2^2102001321 is an apocalyptic number.

2102001321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2102001321 is a deficient number, since it is larger than the sum of its proper divisors (1101048343).

2102001321 is a wasteful number, since it uses less digits than its factorization.

2102001321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100095311.

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

The square root of 2102001321 is about 45847.5879518214. The cubic root of 2102001321 is about 1280.9858374106.

Adding to 2102001321 its reverse (1231002012), we get a palindrome (3333003333).

The spelling of 2102001321 in words is "two billion, one hundred two million, one thousand, three hundred twenty-one".