1021243254312 has 64 divisors (see below), whose sum is σ = 2581245057600. Its totient is φ = 336674257920.

The previous prime is 1021243254307. The next prime is 1021243254341. The reversal of 1021243254312 is 2134523421201.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021243254312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1074112 + ... + 1787792.

It is an arithmetic number, because the mean of its divisors is an integer number (40331954025).

Almost surely, 2^{1021243254312} is an apocalyptic number.

1021243254312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021243254312 is an abundant number, since it is smaller than the sum of its proper divisors (1560001803288).

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

1021243254312 is a wasteful number, since it uses less digits than its factorization.

1021243254312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714346 (or 714342 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 1021243254312 its reverse (2134523421201), we get a palindrome (3155766675513).

The spelling of 1021243254312 in words is "one trillion, twenty-one billion, two hundred forty-three million, two hundred fifty-four thousand, three hundred twelve".