123131000222 has 4 divisors (see below), whose sum is σ = 184696500336. Its totient is φ = 61565500110.

The previous prime is 123131000173. The next prime is 123131000233. The reversal of 123131000222 is 222000131321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222000131321 = 131 ⋅1694657491.

It is a super-2 number, since 2×123131000222² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123131000222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30782750054 + ... + 30782750057.

It is an arithmetic number, because the mean of its divisors is an integer number (46174125084).

Almost surely, 2^123131000222 is an apocalyptic number.

123131000222 is a deficient number, since it is larger than the sum of its proper divisors (61565500114).

123131000222 is an equidigital number, since it uses as much as digits as its factorization.

123131000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61565500113.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 123131000222 its reverse (222000131321), we get a palindrome (345131131543).

The spelling of 123131000222 in words is "one hundred twenty-three billion, one hundred thirty-one million, two hundred twenty-two", and thus it is an aban number.