21220012022001 has 16 divisors (see below), whose sum is σ = 30969265131840. Its totient is φ = 12844395673920.

The previous prime is 21220012021993. The next prime is 21220012022023. The reversal of 21220012022001 is 10022021002212.

It is not a de Polignac number, because 21220012022001 - 2³ = 21220012021993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220012022701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4459857231 + ... + 4459861988.

It is an arithmetic number, because the mean of its divisors is an integer number (1935579070740).

Almost surely, 2^{21220012022001} is an apocalyptic number.

It is an amenable number.

21220012022001 is a deficient number, since it is larger than the sum of its proper divisors (9749253109839).

21220012022001 is a wasteful number, since it uses less digits than its factorization.

21220012022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8919719296.

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

Adding to 21220012022001 its reverse (10022021002212), we get a palindrome (31242033024213).

The spelling of 21220012022001 in words is "twenty-one trillion, two hundred twenty billion, twelve million, twenty-two thousand, one".