20213001111123 has 6 divisors (see below), whose sum is σ = 29196557160524. Its totient is φ = 13475334074076.

The previous prime is 20213001111119. The next prime is 20213001111131. The reversal of 20213001111123 is 32111110031202.

It is not a de Polignac number, because 20213001111123 - 2² = 20213001111119 is a prime.

It is a super-2 number, since 2×20213001111123² (a number of 27 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 = 20213001111096 and 20213001111105.

It is not an unprimeable number, because it can be changed into a prime (20213001181123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122944506165 + ... + 1122944506182.

Almost surely, 2^{20213001111123} is an apocalyptic number.

20213001111123 is a deficient number, since it is larger than the sum of its proper divisors (8983556049401).

20213001111123 is a wasteful number, since it uses less digits than its factorization.

20213001111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245889012353 (or 2245889012350 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 20213001111123 its reverse (32111110031202), we get a palindrome (52324111142325).

The spelling of 20213001111123 in words is "twenty trillion, two hundred thirteen billion, one million, one hundred eleven thousand, one hundred twenty-three".