1000012021320 has 128 divisors (see below), whose sum is σ = 3245297126400. Its totient is φ = 245052877824.

The previous prime is 1000012021301. The next prime is 1000012021357. The reversal of 1000012021320 is 231202100001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1000012021296 and 1000012021305.

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, 1089415 + ... + 1785174.

It is an arithmetic number, because the mean of its divisors is an integer number (25353883800).

Almost surely, 2^{1000012021320} is an apocalyptic number.

1000012021320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000012021320 is an abundant number, since it is smaller than the sum of its proper divisors (2245285105080).

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

1000012021320 is a wasteful number, since it uses less digits than its factorization.

1000012021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874839 (or 2874835 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1000012021320 its reverse (231202100001), we get a palindrome (1231214121321).

The spelling of 1000012021320 in words is "one trillion, twelve million, twenty-one thousand, three hundred twenty".