20213321123 has 8 divisors (see below), whose sum is σ = 20245388592. Its totient is φ = 20181275136.

The previous prime is 20213321119. The next prime is 20213321131. The reversal of 20213321123 is 32112331202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20213321123 - 2² = 20213321119 is a prime.

It is a super-2 number, since 2×20213321123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20213321095 and 20213321104.

It is not an unprimeable number, because it can be changed into a prime (20213326123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3448211 + ... + 3454067.

It is an arithmetic number, because the mean of its divisors is an integer number (2530673574).

Almost surely, 2^20213321123 is an apocalyptic number.

20213321123 is a deficient number, since it is larger than the sum of its proper divisors (32067469).

20213321123 is an equidigital number, since it uses as much as digits as its factorization.

20213321123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10741.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20213321123 its reverse (32112331202), we get a palindrome (52325652325).

The spelling of 20213321123 in words is "twenty billion, two hundred thirteen million, three hundred twenty-one thousand, one hundred twenty-three".