1021213252 has 6 divisors (see below), whose sum is σ = 1787123198. Its totient is φ = 510606624.

The previous prime is 1021213247. The next prime is 1021213289. The reversal of 1021213252 is 2523121201.

It can be written as a sum of positive squares in only one way, i.e., 976937536 + 44275716 = 31256^2 + 6654^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127651653 + ... + 127651660.

Almost surely, 2^1021213252 is an apocalyptic number.

It is an amenable number.

1021213252 is a deficient number, since it is larger than the sum of its proper divisors (765909946).

1021213252 is a wasteful number, since it uses less digits than its factorization.

1021213252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255303317 (or 255303315 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1021213252 is about 31956.4273973171. The cubic root of 1021213252 is about 1007.0216648249.

Adding to 1021213252 its reverse (2523121201), we get a palindrome (3544334453).

The spelling of 1021213252 in words is "one billion, twenty-one million, two hundred thirteen thousand, two hundred fifty-two".