223031123011 has 4 divisors (see below), whose sum is σ = 223332925000. Its totient is φ = 222729321024.

The previous prime is 223031122949. The next prime is 223031123017. The reversal of 223031123011 is 110321130322.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 223031123011 - 2²¹ = 223029025859 is a prime.

It is a super-2 number, since 2×223031123011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223031123011.

It is not an unprimeable number, because it can be changed into a prime (223031123017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150899886 + ... + 150901363.

It is an arithmetic number, because the mean of its divisors is an integer number (55833231250).

Almost surely, 2^223031123011 is an apocalyptic number.

223031123011 is a deficient number, since it is larger than the sum of its proper divisors (301801989).

223031123011 is an equidigital number, since it uses as much as digits as its factorization.

223031123011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301801988.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 223031123011 its reverse (110321130322), we get a palindrome (333352253333).

It can be divided in two parts, 2230 and 31123011, that added together give a square (31125241 = 5579²).

The spelling of 223031123011 in words is "two hundred twenty-three billion, thirty-one million, one hundred twenty-three thousand, eleven".