1021213325 has 24 divisors (see below), whose sum is σ = 1398098016. Its totient is φ = 733736000.

The previous prime is 1021213313. The next prime is 1021213331. The reversal of 1021213325 is 5233121201.

It is not a de Polignac number, because 1021213325 - 2¹⁸ = 1020951181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021213297 and 1021213306.

It is a congruent number.

It is an unprimeable number.

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, 455 + ... + 45195.

It is an arithmetic number, because the mean of its divisors is an integer number (58254084).

Almost surely, 2^1021213325 is an apocalyptic number.

It is an amenable number.

1021213325 is a deficient number, since it is larger than the sum of its proper divisors (376884691).

1021213325 is a wasteful number, since it uses less digits than its factorization.

1021213325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44845 (or 44840 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1021213325 is about 31956.4285394973. The cubic root of 1021213325 is about 1007.0216888201.

Adding to 1021213325 its reverse (5233121201), we get a palindrome (6254334526).

The spelling of 1021213325 in words is "one billion, twenty-one million, two hundred thirteen thousand, three hundred twenty-five".