20213123122 has 16 divisors (see below), whose sum is σ = 30712371840. Its totient is φ = 9975740112.

The previous prime is 20213123107. The next prime is 20213123129. The reversal of 20213123122 is 22132131202.

It is a self number, because there is not a number n which added to its sum of digits gives 20213123122.

It is not an unprimeable number, because it can be changed into a prime (20213123129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592173 + ... + 625375.

It is an arithmetic number, because the mean of its divisors is an integer number (1919523240).

Almost surely, 2^20213123122 is an apocalyptic number.

20213123122 is a deficient number, since it is larger than the sum of its proper divisors (10499248718).

20213123122 is a wasteful number, since it uses less digits than its factorization.

20213123122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37137.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20213123122 its reverse (22132131202), we get a palindrome (42345254324).

The spelling of 20213123122 in words is "twenty billion, two hundred thirteen million, one hundred twenty-three thousand, one hundred twenty-two".