1021230012 has 144 divisors (see below), whose sum is σ = 2841955200. Its totient is φ = 282683520.

The previous prime is 1021229999. The next prime is 1021230017. The reversal of 1021230012 is 2100321201.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1021230012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021230017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1381539 + ... + 1382277.

It is an arithmetic number, because the mean of its divisors is an integer number (19735800).

Almost surely, 2^1021230012 is an apocalyptic number.

1021230012 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 1021230012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1420977600).

1021230012 is an abundant number, since it is smaller than the sum of its proper divisors (1820725188).

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

1021230012 is a wasteful number, since it uses less digits than its factorization.

1021230012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824 (or 803 counting only the distinct ones).

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

The square root of 1021230012 is about 31956.6896283079. The cubic root of 1021230012 is about 1007.0271738247.

Adding to 1021230012 its reverse (2100321201), we get a palindrome (3121551213).

The spelling of 1021230012 in words is "one billion, twenty-one million, two hundred thirty thousand, twelve".