21202211110001 has 48 divisors (see below), whose sum is σ = 22476283315200. Its totient is φ = 19992763908000.

The previous prime is 21202211109997. The next prime is 21202211110049. The reversal of 21202211110001 is 10001111220212.

It is not a de Polignac number, because 21202211110001 - 2² = 21202211109997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202211113001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11579579156 + ... + 11579580986.

It is an arithmetic number, because the mean of its divisors is an integer number (468255902400).

Almost surely, 2^{21202211110001} is an apocalyptic number.

It is an amenable number.

21202211110001 is a deficient number, since it is larger than the sum of its proper divisors (1274072205199).

21202211110001 is a wasteful number, since it uses less digits than its factorization.

21202211110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642 (or 3611 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21202211110001 its reverse (10001111220212), we get a palindrome (31203322330213).

The spelling of 21202211110001 in words is "twenty-one trillion, two hundred two billion, two hundred eleven million, one hundred ten thousand, one".