21123022301 has 2 divisors, whose sum is σ = 21123022302. Its totient is φ = 21123022300.

The previous prime is 21123022259. The next prime is 21123022307. The reversal of 21123022301 is 10322032112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21033700900 + 89321401 = 145030^2 + 9451^2 .

It is a cyclic number.

It is not a de Polignac number, because 21123022301 - 2¹⁰ = 21123021277 is a prime.

It is a super-2 number, since 2×21123022301² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21123022301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21123022307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561511150 + 10561511151.

It is an arithmetic number, because the mean of its divisors is an integer number (10561511151).

Almost surely, 2^21123022301 is an apocalyptic number.

It is an amenable number.

21123022301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21123022301 is an equidigital number, since it uses as much as digits as its factorization.

21123022301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21123022301 its reverse (10322032112), we get a palindrome (31445054413).

The spelling of 21123022301 in words is "twenty-one billion, one hundred twenty-three million, twenty-two thousand, three hundred one".