123121321204 has 24 divisors (see below), whose sum is σ = 247346882048. Its totient is φ = 52529657760.

The previous prime is 123121321201. The next prime is 123121321231. The reversal of 123121321204 is 402123121321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123121321201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9852927 + ... + 9865414.

Almost surely, 2^123121321204 is an apocalyptic number.

123121321204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

123121321204 is an abundant number, since it is smaller than the sum of its proper divisors (124225560844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123121321204 is a wasteful number, since it uses less digits than its factorization.

123121321204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19718575 (or 19718573 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 123121321204 its reverse (402123121321), we get a palindrome (525244442525).

The spelling of 123121321204 in words is "one hundred twenty-three billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred four".