2102212321 has 8 divisors (see below), whose sum is σ = 2294424288. Its totient is φ = 1910184000.

The previous prime is 2102212309. The next prime is 2102212327. The reversal of 2102212321 is 1232122012.

It is a happy number.

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 2102212321 - 2⁵ = 2102212289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102212295 and 2102212304.

It is not an unprimeable number, because it can be changed into a prime (2102212327) 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, 21400 + ... + 68281.

It is an arithmetic number, because the mean of its divisors is an integer number (286803036).

Almost surely, 2^2102212321 is an apocalyptic number.

It is an amenable number.

2102212321 is a deficient number, since it is larger than the sum of its proper divisors (192211967).

2102212321 is a wasteful number, since it uses less digits than its factorization.

2102212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91823.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2102212321 is about 45849.8889965941. Note that the first 3 decimals coincide. The cubic root of 2102212321 is about 1281.0286979875.

Adding to 2102212321 its reverse (1232122012), we get a palindrome (3334334333).

The spelling of 2102212321 in words is "two billion, one hundred two million, two hundred twelve thousand, three hundred twenty-one".