1021122001 has 8 divisors (see below), whose sum is σ = 1028079360. Its totient is φ = 1014175008.

The previous prime is 1021121993. The next prime is 1021122013. The reversal of 1021122001 is 1002211201.

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 1021122001 - 2³ = 1021121993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021122031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347400 + ... + 350326.

It is an arithmetic number, because the mean of its divisors is an integer number (128509920).

Almost surely, 2^1021122001 is an apocalyptic number.

It is an amenable number.

1021122001 is a deficient number, since it is larger than the sum of its proper divisors (6957359).

1021122001 is a wasteful number, since it uses less digits than its factorization.

1021122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5183.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1021122001 is about 31954.9996244719. Note that the first 3 decimals coincide. The cubic root of 1021122001 is about 1006.9916696302.

Adding to 1021122001 its reverse (1002211201), we get a palindrome (2023333202).

The spelling of 1021122001 in words is "one billion, twenty-one million, one hundred twenty-two thousand, one".