1020321031212 has 144 divisors (see below), whose sum is σ = 3104774400000. Its totient is φ = 282116308320.

The previous prime is 1020321031207. The next prime is 1020321031229. The reversal of 1020321031212 is 2121301230201.

1020321031212 is a `hidden beast` number, since 1 + 0 + 20 + 321 + 0 + 312 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 949962 + ... + 1715537.

Almost surely, 2^{1020321031212} is an apocalyptic number.

1020321031212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1020321031212 is an abundant number, since it is smaller than the sum of its proper divisors (2084453368788).

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

1020321031212 is a wasteful number, since it uses less digits than its factorization.

1020321031212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665561 (or 2665542 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1020321031212 its reverse (2121301230201), we get a palindrome (3141622261413).

The spelling of 1020321031212 in words is "one trillion, twenty billion, three hundred twenty-one million, thirty-one thousand, two hundred twelve".