21202112210001 has 8 divisors (see below), whose sum is σ = 28272692869824. Its totient is φ = 14133136511760.

The previous prime is 21202112209961. The next prime is 21202112210003. The reversal of 21202112210001 is 10001221120212.

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

It is not a de Polignac number, because 21202112210001 - 2¹¹ = 21202112207953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202112210003) 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, 401209570 + ... + 401262411.

It is an arithmetic number, because the mean of its divisors is an integer number (3534086608728).

Almost surely, 2^{21202112210001} is an apocalyptic number.

It is an amenable number.

21202112210001 is a deficient number, since it is larger than the sum of its proper divisors (7070580659823).

21202112210001 is an equidigital number, since it uses as much as digits as its factorization.

21202112210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802480791.

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

Adding to 21202112210001 its reverse (10001221120212), we get a palindrome (31203333330213).

The spelling of 21202112210001 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, two hundred ten thousand, one".