201121010 has 16 divisors (see below), whose sum is σ = 364870656. Its totient is φ = 79814448.

The previous prime is 201121001. The next prime is 201121013. The reversal of 201121010 is 10121102.

201121010 = T₄₅₇ + T₄₅₈ + ... + T₁₀₉₁.

It is not an unprimeable number, because it can be changed into a prime (201121013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77912 + ... + 80451.

It is an arithmetic number, because the mean of its divisors is an integer number (22804416).

Almost surely, 2^201121010 is an apocalyptic number.

201121010 is a deficient number, since it is larger than the sum of its proper divisors (163749646).

201121010 is a wasteful number, since it uses less digits than its factorization.

201121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158497.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 201121010 is about 14181.7139302695. The cubic root of 201121010 is about 585.8941302916.

Adding to 201121010 its reverse (10121102), we get a palindrome (211242112).

The spelling of 201121010 in words is "two hundred one million, one hundred twenty-one thousand, ten".