212201001 has 12 divisors (see below), whose sum is σ = 313641328. Its totient is φ = 138177144.

The previous prime is 212200981. The next prime is 212201023. The reversal of 212201001 is 100102212.

It is not a de Polignac number, because 212201001 - 2¹¹ = 212198953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212201051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 273775 + ... + 274548.

Almost surely, 2^212201001 is an apocalyptic number.

It is an amenable number.

212201001 is a deficient number, since it is larger than the sum of its proper divisors (101440327).

212201001 is a wasteful number, since it uses less digits than its factorization.

212201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548372 (or 548369 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 212201001 is about 14567.1205459418. The cubic root of 212201001 is about 596.4615820177.

Adding to 212201001 its reverse (100102212), we get a palindrome (312303213).

It can be divided in two parts, 21 and 2201001, that added together give a palindrome (2201022).

The spelling of 212201001 in words is "two hundred twelve million, two hundred one thousand, one".