123201899444 has 24 divisors (see below), whose sum is σ = 232292955048. Its totient is φ = 56836759680.

The previous prime is 123201899419. The next prime is 123201899453. The reversal of 123201899444 is 444998102321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4707606544 + 118494292900 = 68612^2 + 344230^2 .

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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 in 7 ways as a sum of consecutive naturals, for example, 417887 + ... + 648870.

It is an arithmetic number, because the mean of its divisors is an integer number (9678873127).

Almost surely, 2^123201899444 is an apocalyptic number.

It is an amenable number.

123201899444 is a deficient number, since it is larger than the sum of its proper divisors (109091055604).

123201899444 is a wasteful number, since it uses less digits than its factorization.

123201899444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068995 (or 1068993 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 123201899444 in words is "one hundred twenty-three billion, two hundred one million, eight hundred ninety-nine thousand, four hundred forty-four".