1021323411020 has 48 divisors (see below), whose sum is σ = 2352830457600. Its totient is φ = 369315510720.

The previous prime is 1021323411001. The next prime is 1021323411023. The reversal of 1021323411020 is 201143231201.

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 = 1021323410983 and 1021323411001.

It is not an unprimeable number, because it can be changed into a prime (1021323411023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12928160 + ... + 13006919.

It is an arithmetic number, because the mean of its divisors is an integer number (49017301200).

Almost surely, 2^{1021323411020} is an apocalyptic number.

1021323411020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021323411020 is an abundant number, since it is smaller than the sum of its proper divisors (1331507046580).

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

1021323411020 is a wasteful number, since it uses less digits than its factorization.

1021323411020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25935278 (or 25935276 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1021323411020 its reverse (201143231201), we get a palindrome (1222466642221).

The spelling of 1021323411020 in words is "one trillion, twenty-one billion, three hundred twenty-three million, four hundred eleven thousand, twenty".