21122011201 has 2 divisors, whose sum is σ = 21122011202. Its totient is φ = 21122011200.

The previous prime is 21122011193. The next prime is 21122011213. The reversal of 21122011201 is 10211022112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16893760576 + 4228250625 = 129976^2 + 65025^2 .

It is a cyclic number.

It is not a de Polignac number, because 21122011201 - 2³ = 21122011193 is a prime.

It is a super-2 number, since 2×21122011201² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21120011201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561005600 + 10561005601.

It is an arithmetic number, because the mean of its divisors is an integer number (10561005601).

Almost surely, 2^21122011201 is an apocalyptic number.

It is an amenable number.

21122011201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122011201 is an equidigital number, since it uses as much as digits as its factorization.

21122011201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21122011201 its reverse (10211022112), we get a palindrome (31333033313).

The spelling of 21122011201 in words is "twenty-one billion, one hundred twenty-two million, eleven thousand, two hundred one".