21221022200001 has 16 divisors (see below), whose sum is σ = 30475024048896. Its totient is φ = 13057456576896.

The previous prime is 21221022199987. The next prime is 21221022200039. The reversal of 21221022200001 is 10000222012212.

It is not a de Polignac number, because 21221022200001 - 2⁷ = 21221022199873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21221022200701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33726105 + ... + 34349558.

It is an arithmetic number, because the mean of its divisors is an integer number (1904689003056).

Almost surely, 2^{21221022200001} is an apocalyptic number.

It is an amenable number.

21221022200001 is a deficient number, since it is larger than the sum of its proper divisors (9254001848895).

21221022200001 is a wasteful number, since it uses less digits than its factorization.

21221022200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68083672.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21221022200001 its reverse (10000222012212), we get a palindrome (31221244212213).

The spelling of 21221022200001 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-two million, two hundred thousand, one".