65123310022021 has 4 divisors (see below), whose sum is σ = 67954758283872. Its totient is φ = 62291861760172.

The previous prime is 65123310021997. The next prime is 65123310022031. The reversal of 65123310022021 is 12022001332156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65123310022021 - 2¹⁷ = 65123309890949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65123310022031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1415724130891 + ... + 1415724130936.

It is an arithmetic number, because the mean of its divisors is an integer number (16988689570968).

Almost surely, 2^{65123310022021} is an apocalyptic number.

It is an amenable number.

65123310022021 is a deficient number, since it is larger than the sum of its proper divisors (2831448261851).

65123310022021 is a wasteful number, since it uses less digits than its factorization.

65123310022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831448261850.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 65123310022021 its reverse (12022001332156), we get a palindrome (77145311354177).

The spelling of 65123310022021 in words is "sixty-five trillion, one hundred twenty-three billion, three hundred ten million, twenty-two thousand, twenty-one".