1021220552 has 16 divisors (see below), whose sum is σ = 2088860400. Its totient is φ = 464191120.

The previous prime is 1021220537. The next prime is 1021220561. The reversal of 1021220552 is 2550221201.

It is a happy number.

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 in 3 ways as a sum of consecutive naturals, for example, 5802302 + ... + 5802477.

It is an arithmetic number, because the mean of its divisors is an integer number (130553775).

Almost surely, 2^1021220552 is an apocalyptic number.

It is an amenable number.

1021220552 is an abundant number, since it is smaller than the sum of its proper divisors (1067639848).

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

1021220552 is a wasteful number, since it uses less digits than its factorization.

1021220552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11604796 (or 11604792 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1021220552 is about 31956.5416151373. The cubic root of 1021220552 is about 1007.0240643370.

Adding to 1021220552 its reverse (2550221201), we get a palindrome (3571441753).

The spelling of 1021220552 in words is "one billion, twenty-one million, two hundred twenty thousand, five hundred fifty-two".