20123124213 has 16 divisors (see below), whose sum is σ = 29013569280. Its totient is φ = 12357628416.

The previous prime is 20123124211. The next prime is 20123124223. The reversal of 20123124213 is 31242132102.

It is not a de Polignac number, because 20123124213 - 2¹ = 20123124211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20123124213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123124211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4195168 + ... + 4199961.

It is an arithmetic number, because the mean of its divisors is an integer number (1813348080).

Almost surely, 2^20123124213 is an apocalyptic number.

It is an amenable number.

20123124213 is a deficient number, since it is larger than the sum of its proper divisors (8890445067).

20123124213 is a wasteful number, since it uses less digits than its factorization.

20123124213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8395196.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20123124213 its reverse (31242132102), we get a palindrome (51365256315).

The spelling of 20123124213 in words is "twenty billion, one hundred twenty-three million, one hundred twenty-four thousand, two hundred thirteen".