21202112021001 has 8 divisors (see below), whose sum is σ = 29244292442880. Its totient is φ = 13647336473232.

The previous prime is 21202112020997. The next prime is 21202112021011. The reversal of 21202112021001 is 10012021120212.

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

It is not a de Polignac number, because 21202112021001 - 2² = 21202112020997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202112021011) 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, 121851218425 + ... + 121851218598.

It is an arithmetic number, because the mean of its divisors is an integer number (3655536555360).

Almost surely, 2^{21202112021001} is an apocalyptic number.

It is an amenable number.

21202112021001 is a deficient number, since it is larger than the sum of its proper divisors (8042180421879).

21202112021001 is a wasteful number, since it uses less digits than its factorization.

21202112021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243702437055.

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

Adding to 21202112021001 its reverse (10012021120212), we get a palindrome (31214133141213).

The spelling of 21202112021001 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, twenty-one thousand, one".