123112321210 has 32 divisors (see below), whose sum is σ = 222464506752. Its totient is φ = 49053426240.

The previous prime is 123112321159. The next prime is 123112321223. The reversal of 123112321210 is 12123211321.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10399995 + ... + 10411825.

It is an arithmetic number, because the mean of its divisors is an integer number (6952015836).

Almost surely, 2^123112321210 is an apocalyptic number.

123112321210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123112321210 is a deficient number, since it is larger than the sum of its proper divisors (99352185542).

123112321210 is a wasteful number, since it uses less digits than its factorization.

123112321210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15798.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123112321210 its reverse (12123211321), we get a palindrome (135235532531).

The spelling of 123112321210 in words is "one hundred twenty-three billion, one hundred twelve million, three hundred twenty-one thousand, two hundred ten".