1021130001 has 12 divisors (see below), whose sum is σ = 1485578640. Its totient is φ = 675855000.

The previous prime is 1021129981. The next prime is 1021130003. The reversal of 1021130001 is 1000311201.

It is not a de Polignac number, because 1021130001 - 2¹¹ = 1021127953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1021130003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 406875 + ... + 409376.

It is an arithmetic number, because the mean of its divisors is an integer number (123798220).

Almost surely, 2^1021130001 is an apocalyptic number.

It is an amenable number.

1021130001 is a deficient number, since it is larger than the sum of its proper divisors (464448639).

1021130001 is a wasteful number, since it uses less digits than its factorization.

1021130001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816396 (or 816393 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1021130001 is about 31955.1248002570. The cubic root of 1021130001 is about 1006.9942993885.

Adding to 1021130001 its reverse (1000311201), we get a palindrome (2021441202).

The spelling of 1021130001 in words is "one billion, twenty-one million, one hundred thirty thousand, one".