21220000120001 has 16 divisors (see below), whose sum is σ = 23141210155200. Its totient is φ = 19381274797248.

The previous prime is 21220000119977. The next prime is 21220000120003. The reversal of 21220000120001 is 10002100002212.

It is a happy number.

It is not a de Polignac number, because 21220000120001 - 2⁶ = 21220000119937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220000120003) 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, 28069955 + ... + 28816008.

It is an arithmetic number, because the mean of its divisors is an integer number (1446325634700).

Almost surely, 2^{21220000120001} is an apocalyptic number.

It is an amenable number.

21220000120001 is a deficient number, since it is larger than the sum of its proper divisors (1921210035199).

21220000120001 is a wasteful number, since it uses less digits than its factorization.

21220000120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56886688.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21220000120001 its reverse (10002100002212), we get a palindrome (31222100122213).

The spelling of 21220000120001 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty thousand, one".