1000212201 has 24 divisors (see below), whose sum is σ = 1528240896.
Its totient is φ = 629069760.
The previous prime is 1000212197. The next prime is 1000212211. The reversal of 1000212201 is 1022120001.
It is not a de Polignac number, because 1000212201 - 22 = 1000212197 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (1000212211) 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 23 ways as a sum of consecutive naturals, for example, 17985 + ... + 48206.
It is an arithmetic number, because the mean of its divisors is an integer number (63676704).
Almost surely, 21000212201 is an apocalyptic number.
It is an amenable number.
1000212201 is a deficient number, since it is larger than the sum of its proper divisors (528028695).
1000212201 is a wasteful number, since it uses less digits than its factorization.
1000212201 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 66293 (or 66290 counting only the distinct ones).
The product of its (nonzero) digits is 8, while the sum is 9.
The square root of 1000212201 is about 31626.1316161177.
The cubic root of 1000212201 is about 1000.0707286640.
Adding to 1000212201 its reverse (1022120001), we get a palindrome (2022332202).
The spelling of 1000212201 in words is "one billion, two hundred twelve thousand, two hundred one".