1021224021 has 8 divisors (see below), whose sum is σ = 1368475200. Its totient is φ = 677394432.

The previous prime is 1021224007. The next prime is 1021224077. The reversal of 1021224021 is 1204221201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021224021 - 2¹³ = 1021215829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021220021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 854700 + ... + 855893.

It is an arithmetic number, because the mean of its divisors is an integer number (171059400).

Almost surely, 2^1021224021 is an apocalyptic number.

It is an amenable number.

1021224021 is a deficient number, since it is larger than the sum of its proper divisors (347251179).

1021224021 is a wasteful number, since it uses less digits than its factorization.

1021224021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710795.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1021224021 is about 31956.5958919282. The cubic root of 1021224021 is about 1007.0252045943.

Adding to 1021224021 its reverse (1204221201), we get a palindrome (2225445222).

The spelling of 1021224021 in words is "one billion, twenty-one million, two hundred twenty-four thousand, twenty-one".