201011921 has 8 divisors (see below), whose sum is σ = 219551904. Its totient is φ = 182516320.

The previous prime is 201011911. The next prime is 201011933. The reversal of 201011921 is 129110102.

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 201011921 - 2²⁶ = 133903057 is a prime.

It is a super-2 number, since 2×201011921² = 80811584768220482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201011921.

It is not an unprimeable number, because it can be changed into a prime (201011911) 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 7 ways as a sum of consecutive naturals, for example, 1235 + ... + 20088.

It is an arithmetic number, because the mean of its divisors is an integer number (27443988).

Almost surely, 2^201011921 is an apocalyptic number.

It is an amenable number.

201011921 is a deficient number, since it is larger than the sum of its proper divisors (18539983).

201011921 is a wasteful number, since it uses less digits than its factorization.

201011921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22191.

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

The square root of 201011921 is about 14177.8672937787. The cubic root of 201011921 is about 585.7881805384.

It can be divided in two parts, 20101 and 1921, that added together give a palindrome (22022).

The spelling of 201011921 in words is "two hundred one million, eleven thousand, nine hundred twenty-one".