1231020120132 has 144 divisors (see below), whose sum is σ = 3425979473280. Its totient is φ = 369594086400.

The previous prime is 1231020120119. The next prime is 1231020120151. The reversal of 1231020120132 is 2310210201321.

1231020120132 is a `hidden beast` number, since 1 + 2 + 310 + 201 + 20 + 132 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 224676969 + ... + 224682447.

It is an arithmetic number, because the mean of its divisors is an integer number (23791524120).

Almost surely, 2^{1231020120132} is an apocalyptic number.

1231020120132 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 1231020120132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1712989736640).

1231020120132 is an abundant number, since it is smaller than the sum of its proper divisors (2194959353148).

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

1231020120132 is a wasteful number, since it uses less digits than its factorization.

1231020120132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10634 (or 10629 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1231020120132 its reverse (2310210201321), we get a palindrome (3541230321453).

The spelling of 1231020120132 in words is "one trillion, two hundred thirty-one billion, twenty million, one hundred twenty thousand, one hundred thirty-two".