21121110202201 has 2 divisors, whose sum is σ = 21121110202202. Its totient is φ = 21121110202200.

The previous prime is 21121110202183. The next prime is 21121110202207. The reversal of 21121110202201 is 10220201112112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20320937015625 + 800173186576 = 4507875^2 + 894524^2 .

It is a cyclic number.

It is not a de Polignac number, because 21121110202201 - 2³³ = 21112520267609 is a prime.

It is a super-2 number, since 2×21121110202201² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21121110202207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560555101100 + 10560555101101.

It is an arithmetic number, because the mean of its divisors is an integer number (10560555101101).

Almost surely, 2^{21121110202201} is an apocalyptic number.

It is an amenable number.

21121110202201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121110202201 is an equidigital number, since it uses as much as digits as its factorization.

21121110202201 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 16.

Adding to 21121110202201 its reverse (10220201112112), we get a palindrome (31341311314313).

The spelling of 21121110202201 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred two thousand, two hundred one".