20312223111 has 12 divisors (see below), whose sum is σ = 30132847992. Its totient is φ = 13175495856.

The previous prime is 20312223109. The next prime is 20312223133. The reversal of 20312223111 is 11132221302.

20312223111 is a `hidden beast` number, since 20 + 312 + 22 + 311 + 1 = 666.

It is not a de Polignac number, because 20312223111 - 2¹ = 20312223109 is a prime.

It is a super-2 number, since 2×20312223111² (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 (20312223161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30498501 + ... + 30499166.

It is an arithmetic number, because the mean of its divisors is an integer number (2511070666).

Almost surely, 2^20312223111 is an apocalyptic number.

20312223111 is a deficient number, since it is larger than the sum of its proper divisors (9820624881).

20312223111 is a wasteful number, since it uses less digits than its factorization.

20312223111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60997710 (or 60997707 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20312223111 its reverse (11132221302), we get a palindrome (31444444413).

The spelling of 20312223111 in words is "twenty billion, three hundred twelve million, two hundred twenty-three thousand, one hundred eleven".