1021110001 has 12 divisors (see below), whose sum is σ = 1080847296. Its totient is φ = 962848040.

The previous prime is 1021109993. The next prime is 1021110007. The reversal of 1021110001 is 1000111201.

It is not a de Polignac number, because 1021110001 - 2³ = 1021109993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021110007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111540 + ... + 120346.

It is an arithmetic number, because the mean of its divisors is an integer number (90070608).

Almost surely, 2^1021110001 is an apocalyptic number.

It is an amenable number.

1021110001 is a deficient number, since it is larger than the sum of its proper divisors (59737295).

1021110001 is an frugal number, since it uses more digits than its factorization.

1021110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8972 (or 8901 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1021110001 is about 31954.8118598749. The cubic root of 1021110001 is about 1006.9877249669.

Adding to 1021110001 its reverse (1000111201), we get a palindrome (2021221202).

The spelling of 1021110001 in words is "one billion, twenty-one million, one hundred ten thousand, one".