155120012 has 12 divisors (see below), whose sum is σ = 271946136. Its totient is φ = 77421120.

The previous prime is 155120003. The next prime is 155120023. The reversal of 155120012 is 210021551.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32189 + ... + 36692.

It is an arithmetic number, because the mean of its divisors is an integer number (22662178).

Almost surely, 2^155120012 is an apocalyptic number.

It is an amenable number.

155120012 is a deficient number, since it is larger than the sum of its proper divisors (116826124).

155120012 is a wasteful number, since it uses less digits than its factorization.

155120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69448 (or 69446 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 155120012 is about 12454.7184632974. The cubic root of 155120012 is about 537.3071377293.

Adding to 155120012 its reverse (210021551), we get a palindrome (365141563).

The spelling of 155120012 in words is "one hundred fifty-five million, one hundred twenty thousand, twelve".