123155143320 has 128 divisors (see below), whose sum is σ = 416951712000. Its totient is φ = 28826273280.

The previous prime is 123155143277. The next prime is 123155143337. The reversal of 123155143320 is 23341551321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 1570330 + ... + 1646889.

It is an arithmetic number, because the mean of its divisors is an integer number (3257435250).

Almost surely, 2^123155143320 is an apocalyptic number.

123155143320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123155143320 is an abundant number, since it is smaller than the sum of its proper divisors (293796568680).

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

123155143320 is a wasteful number, since it uses less digits than its factorization.

123155143320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217273 (or 3217269 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 123155143320 its reverse (23341551321), we get a palindrome (146496694641).

The spelling of 123155143320 in words is "one hundred twenty-three billion, one hundred fifty-five million, one hundred forty-three thousand, three hundred twenty".