20123121332213 has 16 divisors (see below), whose sum is σ = 20391945773760. Its totient is φ = 19856063760000.

The previous prime is 20123121332191. The next prime is 20123121332297. The reversal of 20123121332213 is 31223312132102.

It is a cyclic number.

It is not a de Polignac number, because 20123121332213 - 2³⁰ = 20122047590389 is a prime.

It is a super-2 number, since 2×20123121332213² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123121932213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291600713 + ... + 291669713.

It is an arithmetic number, because the mean of its divisors is an integer number (1274496610860).

Almost surely, 2^{20123121332213} is an apocalyptic number.

It is an amenable number.

20123121332213 is a deficient number, since it is larger than the sum of its proper divisors (268824441547).

20123121332213 is a wasteful number, since it uses less digits than its factorization.

20123121332213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81748.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 20123121332213 its reverse (31223312132102), we get a palindrome (51346433464315).

The spelling of 20123121332213 in words is "twenty trillion, one hundred twenty-three billion, one hundred twenty-one million, three hundred thirty-two thousand, two hundred thirteen".