201211901 has 8 divisors (see below), whose sum is σ = 219655584. Its totient is φ = 182793520.

The previous prime is 201211877. The next prime is 201211909. The reversal of 201211901 is 109112102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201211901 - 2¹⁴ = 201195517 is a prime.

It is a super-3 number, since 3×201211901³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201211901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12851 + ... + 23823.

It is an arithmetic number, because the mean of its divisors is an integer number (27456948).

Almost surely, 2^201211901 is an apocalyptic number.

It is an amenable number.

201211901 is a deficient number, since it is larger than the sum of its proper divisors (18443683).

201211901 is a wasteful number, since it uses less digits than its factorization.

201211901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12651.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 201211901 is about 14184.9180822450. The cubic root of 201211901 is about 585.9823764730.

It can be divided in two parts, 20121 and 1901, that added together give a palindrome (22022).

The spelling of 201211901 in words is "two hundred one million, two hundred eleven thousand, nine hundred one".