1021213242 has 48 divisors (see below), whose sum is σ = 2559211200. Its totient is φ = 288256896.

The previous prime is 1021213111. The next prime is 1021213247. The reversal of 1021213242 is 2423121201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1021213247) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 38367 + ... + 59282.

It is an arithmetic number, because the mean of its divisors is an integer number (53316900).

Almost surely, 2^1021213242 is an apocalyptic number.

1021213242 is an abundant number, since it is smaller than the sum of its proper divisors (1537997958).

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

1021213242 is a wasteful number, since it uses less digits than its factorization.

1021213242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97747 (or 97744 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1021213242 is about 31956.4272408541. The cubic root of 1021213242 is about 1007.0216615379.

Adding to 1021213242 its reverse (2423121201), we get a palindrome (3444334443).

The spelling of 1021213242 in words is "one billion, twenty-one million, two hundred thirteen thousand, two hundred forty-two".