1331052021 has 40 divisors (see below), whose sum is σ = 2234453760. Its totient is φ = 783481248.

The previous prime is 1331052007. The next prime is 1331052029. The reversal of 1331052021 is 1202501331.

1331052021 is a `hidden beast` number, since 133 + 10 + 520 + 2 + 1 = 666.

It is not a de Polignac number, because 1331052021 - 2⁷ = 1331051893 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1331051985 and 1331052003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331052029) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3261 + ... + 51698.

It is an arithmetic number, because the mean of its divisors is an integer number (55861344).

Almost surely, 2^1331052021 is an apocalyptic number.

It is an amenable number.

1331052021 is a deficient number, since it is larger than the sum of its proper divisors (903401739).

1331052021 is a wasteful number, since it uses less digits than its factorization.

1331052021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55007 (or 54998 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1331052021 is about 36483.5856379276. The cubic root of 1331052021 is about 1100.0143306673.

Adding to 1331052021 its reverse (1202501331), we get a palindrome (2533553352).

The spelling of 1331052021 in words is "one billion, three hundred thirty-one million, fifty-two thousand, twenty-one".