1020320421000 has 128 divisors (see below), whose sum is σ = 3230913778560. Its totient is φ = 268024416000.

The previous prime is 1020320420971. The next prime is 1020320421023. The reversal of 1020320421000 is 1240230201.

1020320421000 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2337111 + ... + 2739110.

It is an arithmetic number, because the mean of its divisors is an integer number (25241513895).

Almost surely, 2^{1020320421000} is an apocalyptic number.

1020320421000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020320421000 is an abundant number, since it is smaller than the sum of its proper divisors (2210593357560).

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

1020320421000 is a wasteful number, since it uses less digits than its factorization.

1020320421000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076312 (or 5076298 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 1020320421000 its reverse (1240230201), we get a palindrome (1021560651201).

The spelling of 1020320421000 in words is "one trillion, twenty billion, three hundred twenty million, four hundred twenty-one thousand".