1020123320420 has 48 divisors (see below), whose sum is σ = 2166805831680. Its totient is φ = 403375754496.

The previous prime is 1020123320413. The next prime is 1020123320441. The reversal of 1020123320420 is 240233210201.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1020123320392 and 1020123320401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8346269 + ... + 8467611.

It is an arithmetic number, because the mean of its divisors is an integer number (45141788160).

Almost surely, 2^{1020123320420} is an apocalyptic number.

1020123320420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020123320420 is an abundant number, since it is smaller than the sum of its proper divisors (1146682511260).

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

1020123320420 is a wasteful number, since it uses less digits than its factorization.

1020123320420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126164 (or 126162 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 1020123320420 its reverse (240233210201), we get a palindrome (1260356530621).

The spelling of 1020123320420 in words is "one trillion, twenty billion, one hundred twenty-three million, three hundred twenty thousand, four hundred twenty".