120155021052 has 96 divisors (see below), whose sum is σ = 316566835200. Its totient is φ = 35136057600.

The previous prime is 120155021033. The next prime is 120155021053. The reversal of 120155021052 is 250120551021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120155021053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8073474 + ... + 8088342.

It is an arithmetic number, because the mean of its divisors is an integer number (3297571200).

Almost surely, 2^120155021052 is an apocalyptic number.

120155021052 is a gapful number since it is divisible by the number (12) 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 120155021052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158283417600).

120155021052 is an abundant number, since it is smaller than the sum of its proper divisors (196411814148).

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

120155021052 is a wasteful number, since it uses less digits than its factorization.

120155021052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17027 (or 17025 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

Adding to 120155021052 its reverse (250120551021), we get a palindrome (370275572073).

The spelling of 120155021052 in words is "one hundred twenty billion, one hundred fifty-five million, twenty-one thousand, fifty-two".