123400220012 has 24 divisors (see below), whose sum is σ = 220574032896. Its totient is φ = 60379412688.

The previous prime is 123400219993. The next prime is 123400220039. The reversal of 123400220012 is 210022004321.

It is a super-2 number, since 2×123400220012² (a number of 23 digits) contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 1548413 + ... + 1626155.

It is an arithmetic number, because the mean of its divisors is an integer number (9190584704).

Almost surely, 2^123400220012 is an apocalyptic number.

It is an amenable number.

123400220012 is a deficient number, since it is larger than the sum of its proper divisors (97173812884).

123400220012 is a wasteful number, since it uses less digits than its factorization.

123400220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86237 (or 86235 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 123400220012 its reverse (210022004321), we get a palindrome (333422224333).

The spelling of 123400220012 in words is "one hundred twenty-three billion, four hundred million, two hundred twenty thousand, twelve".