10202201021 has 4 divisors (see below), whose sum is σ = 10212752352.
Its totient is φ = 10191649692.
The previous prime is 10202200949. The next prime is 10202201033. The reversal of 10202201021 is 12010220201.
It is a happy number.
10202201021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 10202201021 - 222 = 10198006717 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 10202200993 and 10202201011.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (10202203021) 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 3 ways as a sum of consecutive naturals, for example, 5274215 + ... + 5276148.
It is an arithmetic number, because the mean of its divisors is an integer number (2553188088).
Almost surely, 210202201021 is an apocalyptic number.
It is an amenable number.
10202201021 is a deficient number, since it is larger than the sum of its proper divisors (10551331).
10202201021 is an equidigital number, since it uses as much as digits as its factorization.
10202201021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10551330.
The product of its (nonzero) digits is 16, while the sum is 11.
Adding to 10202201021 its reverse (12010220201), we get a palindrome (22212421222).
The spelling of 10202201021 in words is "ten billion, two hundred two million, two hundred one thousand, twenty-one".