1021212312 has 32 divisors (see below), whose sum is σ = 2588993280. Its totient is φ = 335609120.

The previous prime is 1021212307. The next prime is 1021212331. The reversal of 1021212312 is 2132121201.

It is a junction number, because it is equal to n+sod(n) for n = 1021212291 and 1021212300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297948 + ... + 301355.

It is an arithmetic number, because the mean of its divisors is an integer number (80906040).

Almost surely, 2^1021212312 is an apocalyptic number.

1021212312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021212312 is an abundant number, since it is smaller than the sum of its proper divisors (1567780968).

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

1021212312 is a wasteful number, since it uses less digits than its factorization.

1021212312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599383 (or 599379 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1021212312 is about 31956.4126897873. The cubic root of 1021212312 is about 1007.0213558458.

Adding to 1021212312 its reverse (2132121201), we get a palindrome (3153333513).

The spelling of 1021212312 in words is "one billion, twenty-one million, two hundred twelve thousand, three hundred twelve".