155122621120 has 336 divisors, whose sum is σ = 406783641600. Its totient is φ = 56182118400.

The previous prime is 155122621097. The next prime is 155122621163. The reversal of 155122621120 is 21126221551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 812160225 + ... + 812160415.

It is an arithmetic number, because the mean of its divisors is an integer number (1210665600).

Almost surely, 2^155122621120 is an apocalyptic number.

155122621120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155122621120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203391820800).

155122621120 is an abundant number, since it is smaller than the sum of its proper divisors (251661020480).

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

155122621120 is a wasteful number, since it uses less digits than its factorization.

155122621120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 155122621120 its reverse (21126221551), we get a palindrome (176248842671).

The spelling of 155122621120 in words is "one hundred fifty-five billion, one hundred twenty-two million, six hundred twenty-one thousand, one hundred twenty".