20123210021293 has 2 divisors, whose sum is σ = 20123210021294. Its totient is φ = 20123210021292.

The previous prime is 20123210021267. The next prime is 20123210021351. The reversal of 20123210021293 is 39212001232102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16785712179369 + 3337497841924 = 4097037^2 + 1826882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123210021293 is a prime.

It is a super-2 number, since 2×20123210021293² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123210021093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061605010646 + 10061605010647.

It is an arithmetic number, because the mean of its divisors is an integer number (10061605010647).

Almost surely, 2^{20123210021293} is an apocalyptic number.

It is an amenable number.

20123210021293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123210021293 is an equidigital number, since it uses as much as digits as its factorization.

20123210021293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 20123210021293 its reverse (39212001232102), we get a palindrome (59335211253395).

The spelling of 20123210021293 in words is "twenty trillion, one hundred twenty-three billion, two hundred ten million, twenty-one thousand, two hundred ninety-three".