201051221 has 8 divisors (see below), whose sum is σ = 232142400. Its totient is φ = 170552448.

The previous prime is 201051203. The next prime is 201051223. The reversal of 201051221 is 122150102.

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 201051221 - 2¹⁰ = 201050197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201051196 and 201051205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201051223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147371 + ... + 148728.

It is an arithmetic number, because the mean of its divisors is an integer number (29017800).

Almost surely, 2^201051221 is an apocalyptic number.

It is an amenable number.

201051221 is a deficient number, since it is larger than the sum of its proper divisors (31091179).

201051221 is an equidigital number, since it uses as much as digits as its factorization.

201051221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296203.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 201051221 is about 14179.2531890788. The cubic root of 201051221 is about 585.8263540212.

The spelling of 201051221 in words is "two hundred one million, fifty-one thousand, two hundred twenty-one".