201421110 has 64 divisors (see below), whose sum is σ = 540255744. Its totient is φ = 47635200.

The previous prime is 201421093. The next prime is 201421123. The reversal of 201421110 is 11124102.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6087 + ... + 20973.

It is an arithmetic number, because the mean of its divisors is an integer number (8441496).

Almost surely, 2^201421110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201421110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270127872).

201421110 is an abundant number, since it is smaller than the sum of its proper divisors (338834634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201421110 is a wasteful number, since it uses less digits than its factorization.

201421110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14949.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 201421110 is about 14192.2905128101. The cubic root of 201421110 is about 586.1853968088.

Adding to 201421110 its reverse (11124102), we get a palindrome (212545212).

The spelling of 201421110 in words is "two hundred one million, four hundred twenty-one thousand, one hundred ten".