1023312120020 has 48 divisors (see below), whose sum is σ = 2151324645120. Its totient is φ = 408873828864.

The previous prime is 1023312120001. The next prime is 1023312120029. The reversal of 1023312120020 is 200212133201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023312120029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89389937 + ... + 89401383.

It is an arithmetic number, because the mean of its divisors is an integer number (44819263440).

Almost surely, 2^{1023312120020} is an apocalyptic number.

1023312120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023312120020 is an abundant number, since it is smaller than the sum of its proper divisors (1128012525100).

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

1023312120020 is a wasteful number, since it uses less digits than its factorization.

1023312120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15992 (or 15990 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1023312120020 its reverse (200212133201), we get a palindrome (1223524253221).

The spelling of 1023312120020 in words is "one trillion, twenty-three billion, three hundred twelve million, one hundred twenty thousand, twenty".