123154221050 has 72 divisors (see below), whose sum is σ = 278051105376. Its totient is φ = 40388446560.

The previous prime is 123154221013. The next prime is 123154221067. The reversal of 123154221050 is 50122451321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1036412 + ... + 1149111.

It is an arithmetic number, because the mean of its divisors is an integer number (3861820908).

Almost surely, 2^123154221050 is an apocalyptic number.

123154221050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123154221050 is an abundant number, since it is smaller than the sum of its proper divisors (154896884326).

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

123154221050 is a wasteful number, since it uses less digits than its factorization.

123154221050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185572 (or 2185560 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 123154221050 its reverse (50122451321), we get a palindrome (173276672371).

The spelling of 123154221050 in words is "one hundred twenty-three billion, one hundred fifty-four million, two hundred twenty-one thousand, fifty".