21122021210201 has 2 divisors, whose sum is σ = 21122021210202. Its totient is φ = 21122021210200.

The previous prime is 21122021210197. The next prime is 21122021210203. The reversal of 21122021210201 is 10201212022112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19559081179225 + 1562940030976 = 4422565^2 + 1250176^2 .

It is a cyclic number.

It is not a de Polignac number, because 21122021210201 - 2² = 21122021210197 is a prime.

It is a super-2 number, since 2×21122021210201² (a number of 27 digits) contains 22 as substring.

Together with 21122021210203, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21122021210201.

It is not a weakly prime, because it can be changed into another prime (21122021210203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561010605100 + 10561010605101.

It is an arithmetic number, because the mean of its divisors is an integer number (10561010605101).

Almost surely, 2^{21122021210201} is an apocalyptic number.

It is an amenable number.

21122021210201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122021210201 is an equidigital number, since it uses as much as digits as its factorization.

21122021210201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21122021210201 its reverse (10201212022112), we get a palindrome (31323233232313).

The spelling of 21122021210201 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-one million, two hundred ten thousand, two hundred one".