12210201021 has 32 divisors (see below), whose sum is σ = 18029692800.
Its totient is φ = 7320222720.
The previous prime is 12210201019. The next prime is 12210201049. The reversal of 12210201021 is 12010201221.
Adding to 12210201021 its reverse (12010201221), we get a palindrome (24220402242).
It is not a de Polignac number, because 12210201021 - 21 = 12210201019 is a prime.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 12210200988 and 12210201006.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12210201001) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15865 + ... + 157073.
It is an arithmetic number, because the mean of its divisors is an integer number (563427900).
Almost surely, 212210201021 is an apocalyptic number.
It is an amenable number.
12210201021 is a deficient number, since it is larger than the sum of its proper divisors (5819491779).
12210201021 is a wasteful number, since it uses less digits than its factorization.
12210201021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 141309.
The product of its (nonzero) digits is 16, while the sum is 12.
The spelling of 12210201021 in words is "twelve billion, two hundred ten million, two hundred one thousand, twenty-one".