21222011201 has 2 divisors, whose sum is σ = 21222011202. Its totient is φ = 21222011200.

The previous prime is 21222011147. The next prime is 21222011249. The reversal of 21222011201 is 10211022212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11266761025 + 9955250176 = 106145^2 + 99776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222011201 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222011281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611005600 + 10611005601.

It is an arithmetic number, because the mean of its divisors is an integer number (10611005601).

Almost surely, 2^21222011201 is an apocalyptic number.

It is an amenable number.

21222011201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222011201 is an equidigital number, since it uses as much as digits as its factorization.

21222011201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21222011201 its reverse (10211022212), we get a palindrome (31433033413).

It can be divided in two parts, 21222011 and 201, that added together give a palindrome (21222212).

The spelling of 21222011201 in words is "twenty-one billion, two hundred twenty-two million, eleven thousand, two hundred one".