1021331045 has 16 divisors (see below), whose sum is σ = 1401415680. Its totient is φ = 699974784.

The previous prime is 1021331029. The next prime is 1021331081. The reversal of 1021331045 is 5401331201.

It is a cyclic number.

It is not a de Polignac number, because 1021331045 - 2⁴ = 1021331029 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71849 + ... + 84881.

It is an arithmetic number, because the mean of its divisors is an integer number (87588480).

Almost surely, 2^1021331045 is an apocalyptic number.

It is an amenable number.

1021331045 is a deficient number, since it is larger than the sum of its proper divisors (380084635).

1021331045 is a wasteful number, since it uses less digits than its factorization.

1021331045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15284.

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

The square root of 1021331045 is about 31958.2703693426. The cubic root of 1021331045 is about 1007.0603820214.

Adding to 1021331045 its reverse (5401331201), we get a palindrome (6422662246).

The spelling of 1021331045 in words is "one billion, twenty-one million, three hundred thirty-one thousand, forty-five".