20112211143 has 28 divisors (see below), whose sum is σ = 30209269608. Its totient is φ = 13383798480.

The previous prime is 20112211121. The next prime is 20112211159. The reversal of 20112211143 is 34111221102.

It is not a de Polignac number, because 20112211143 - 2¹⁰ = 20112210119 is a prime.

It is a super-2 number, since 2×20112211143² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112211183) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 381288 + ... + 430818.

It is an arithmetic number, because the mean of its divisors is an integer number (1078902486).

Almost surely, 2^20112211143 is an apocalyptic number.

20112211143 is a deficient number, since it is larger than the sum of its proper divisors (10097058465).

20112211143 is an frugal number, since it uses more digits than its factorization.

20112211143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50106 (or 50091 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20112211143 its reverse (34111221102), we get a palindrome (54223432245).

The spelling of 20112211143 in words is "twenty billion, one hundred twelve million, two hundred eleven thousand, one hundred forty-three".