1021131653 has 8 divisors (see below), whose sum is σ = 1034335008. Its totient is φ = 1007949904.

The previous prime is 1021131641. The next prime is 1021131659. The reversal of 1021131653 is 3561311201.

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

It is a cyclic number.

It is not a de Polignac number, because 1021131653 - 2¹² = 1021127557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021131659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103775 + ... + 113187.

It is an arithmetic number, because the mean of its divisors is an integer number (129291876).

Almost surely, 2^1021131653 is an apocalyptic number.

It is an amenable number.

1021131653 is a deficient number, since it is larger than the sum of its proper divisors (13203355).

1021131653 is an equidigital number, since it uses as much as digits as its factorization.

1021131653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10803.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1021131653 is about 31955.1506489955. The cubic root of 1021131653 is about 1006.9948424319.

Adding to 1021131653 its reverse (3561311201), we get a palindrome (4582442854).

The spelling of 1021131653 in words is "one billion, twenty-one million, one hundred thirty-one thousand, six hundred fifty-three".