1021054321 has 4 divisors (see below), whose sum is σ = 1166919232. Its totient is φ = 875189412.

The previous prime is 1021054313. The next prime is 1021054373. The reversal of 1021054321 is 1234501201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021054321 - 2³ = 1021054313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021054421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72932445 + ... + 72932458.

It is an arithmetic number, because the mean of its divisors is an integer number (291729808).

Almost surely, 2^1021054321 is an apocalyptic number.

It is an amenable number.

1021054321 is a deficient number, since it is larger than the sum of its proper divisors (145864911).

1021054321 is an equidigital number, since it uses as much as digits as its factorization.

1021054321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145864910.

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

The square root of 1021054321 is about 31953.9406177079. The cubic root of 1021054321 is about 1006.9694213249.

Adding to 1021054321 its reverse (1234501201), we get a palindrome (2255555522).

The spelling of 1021054321 in words is "one billion, twenty-one million, fifty-four thousand, three hundred twenty-one".