1000020120144 has 40 divisors (see below), whose sum is σ = 2598854704320. Its totient is φ = 331343989248.

The previous prime is 1000020120131. The next prime is 1000020120149. The reversal of 1000020120144 is 4410210200001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000020120149) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 62368489 + ... + 62384520.

It is an arithmetic number, because the mean of its divisors is an integer number (64971367608).

Almost surely, 2^{1000020120144} is an apocalyptic number.

It is an amenable number.

1000020120144 is an abundant number, since it is smaller than the sum of its proper divisors (1598834584176).

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

1000020120144 is a wasteful number, since it uses less digits than its factorization.

1000020120144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124753187 (or 124753181 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1000020120144 its reverse (4410210200001), we get a palindrome (5410230320145).

The spelling of 1000020120144 in words is "one trillion, twenty million, one hundred twenty thousand, one hundred forty-four".