1021230331212 has 96 divisors (see below), whose sum is σ = 2933744934400. Its totient is φ = 269245389312.

The previous prime is 1021230331207. The next prime is 1021230331229. The reversal of 1021230331212 is 2121330321201.

It is a super-2 number, since 2×1021230331212² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3141864 + ... + 3451632.

Almost surely, 2^{1021230331212} is an apocalyptic number.

1021230331212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021230331212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1466872467200).

1021230331212 is an abundant number, since it is smaller than the sum of its proper divisors (1912514603188).

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

1021230331212 is a wasteful number, since it uses less digits than its factorization.

1021230331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312815 (or 312813 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1021230331212 its reverse (2121330321201), we get a palindrome (3142560652413).

The spelling of 1021230331212 in words is "one trillion, twenty-one billion, two hundred thirty million, three hundred thirty-one thousand, two hundred twelve".