10221121001 has 32 divisors (see below), whose sum is σ = 12831678720. Its totient is φ = 7925981184.

The previous prime is 10221120979. The next prime is 10221121007. The reversal of 10221121001 is 10012112201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10221121001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10221121007) 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 31 ways as a sum of consecutive naturals, for example, 1892561 + ... + 1897953.

It is an arithmetic number, because the mean of its divisors is an integer number (400989960).

Almost surely, 2^10221121001 is an apocalyptic number.

It is an amenable number.

10221121001 is a deficient number, since it is larger than the sum of its proper divisors (2610557719).

10221121001 is a wasteful number, since it uses less digits than its factorization.

10221121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10221121001 its reverse (10012112201), we get a palindrome (20233233202).

The spelling of 10221121001 in words is "ten billion, two hundred twenty-one million, one hundred twenty-one thousand, one".