21222001214201 has 2 divisors, whose sum is σ = 21222001214202. Its totient is φ = 21222001214200.

The previous prime is 21222001214107. The next prime is 21222001214221. The reversal of 21222001214201 is 10241210022212.

It is a happy number.

It is an a-pointer prime, because the next prime (21222001214221) can be obtained adding 21222001214201 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18172870591225 + 3049130622976 = 4262965^2 + 1746176^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222001214201 - 2³⁰ = 21220927472377 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222001214221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611000607100 + 10611000607101.

It is an arithmetic number, because the mean of its divisors is an integer number (10611000607101).

Almost surely, 2^{21222001214201} is an apocalyptic number.

It is an amenable number.

21222001214201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222001214201 is an equidigital number, since it uses as much as digits as its factorization.

21222001214201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21222001214201 its reverse (10241210022212), we get a palindrome (31463211236413).

The spelling of 21222001214201 in words is "twenty-one trillion, two hundred twenty-two billion, one million, two hundred fourteen thousand, two hundred one".