21421122301 has 2 divisors, whose sum is σ = 21421122302. Its totient is φ = 21421122300.

The previous prime is 21421122299. The next prime is 21421122311. The reversal of 21421122301 is 10322112412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12808354276 + 8612768025 = 113174^2 + 92805^2 .

It is a cyclic number.

It is not a de Polignac number, because 21421122301 - 2¹ = 21421122299 is a prime.

Together with 21421122299, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21421122311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10710561150 + 10710561151.

It is an arithmetic number, because the mean of its divisors is an integer number (10710561151).

Almost surely, 2^21421122301 is an apocalyptic number.

It is an amenable number.

21421122301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21421122301 is an equidigital number, since it uses as much as digits as its factorization.

21421122301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21421122301 its reverse (10322112412), we get a palindrome (31743234713).

The spelling of 21421122301 in words is "twenty-one billion, four hundred twenty-one million, one hundred twenty-two thousand, three hundred one".