21210221210001 has 8 divisors (see below), whose sum is σ = 28554860917440. Its totient is φ = 14002864487952.

The previous prime is 21210221209997. The next prime is 21210221210021. The reversal of 21210221210001 is 10001212201212.

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

It is not a de Polignac number, because 21210221210001 - 2² = 21210221209997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21210221210021) 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, 34320745986 + ... + 34320746603.

It is an arithmetic number, because the mean of its divisors is an integer number (3569357614680).

Almost surely, 2^{21210221210001} is an apocalyptic number.

It is an amenable number.

21210221210001 is a deficient number, since it is larger than the sum of its proper divisors (7344639707439).

21210221210001 is a wasteful number, since it uses less digits than its factorization.

21210221210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68641492695.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21210221210001 its reverse (10001212201212), we get a palindrome (31211433411213).

The spelling of 21210221210001 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-one million, two hundred ten thousand, one".