21000001162201 has 2 divisors, whose sum is σ = 21000001162202. Its totient is φ = 21000001162200.

The previous prime is 21000001162183. The next prime is 21000001162211. The reversal of 21000001162201 is 10226110000012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20915987560000 + 84013602201 = 4573400^2 + 289851^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000001162201 - 2³³ = 20991411227609 is a prime.

It is a super-2 number, since 2×21000001162201² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21000001162211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500000581100 + 10500000581101.

It is an arithmetic number, because the mean of its divisors is an integer number (10500000581101).

Almost surely, 2^{21000001162201} is an apocalyptic number.

It is an amenable number.

21000001162201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000001162201 is an equidigital number, since it uses as much as digits as its factorization.

21000001162201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21000001162201 its reverse (10226110000012), we get a palindrome (31226111162213).

The spelling of 21000001162201 in words is "twenty-one trillion, one million, one hundred sixty-two thousand, two hundred one".