10011001021 has 16 divisors (see below), whose sum is σ = 12127999104.
Its totient is φ = 8066870784.
The previous prime is 10011001003. The next prime is 10011001051. The reversal of 10011001021 is 12010011001.
Adding to 10011001021 its reverse (12010011001), we get a palindrome (22021012022).
10011001021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is not a de Polignac number, because 10011001021 - 217 = 10010869949 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (7).
It is a junction number, because it is equal to n+sod(n) for n = 10011000995 and 10011001013.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (10011001051) 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 15 ways as a sum of consecutive naturals, for example, 57441 + ... + 152713.
It is an arithmetic number, because the mean of its divisors is an integer number (757999944).
Almost surely, 210011001021 is an apocalyptic number.
It is an amenable number.
10011001021 is a deficient number, since it is larger than the sum of its proper divisors (2116998083).
10011001021 is an equidigital number, since it uses as much as digits as its factorization.
10011001021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 96180.
The product of its (nonzero) digits is 2, while the sum is 7.
The spelling of 10011001021 in words is "ten billion, eleven million, one thousand, twenty-one".