201131021 has 16 divisors (see below), whose sum is σ = 258311424. Its totient is φ = 152216064.

The previous prime is 201130999. The next prime is 201131053. The reversal of 201131021 is 120131102.

201131021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201131021 - 2⁶ = 201130957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201130993 and 201131011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201133021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45956 + ... + 50141.

It is an arithmetic number, because the mean of its divisors is an integer number (16144464).

Almost surely, 2^201131021 is an apocalyptic number.

It is an amenable number.

201131021 is a deficient number, since it is larger than the sum of its proper divisors (57180403).

201131021 is a wasteful number, since it uses less digits than its factorization.

201131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96140.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 201131021 is about 14182.0668803951. The cubic root of 201131021 is about 585.9038512863.

Adding to 201131021 its reverse (120131102), we get a palindrome (321262123).

The spelling of 201131021 in words is "two hundred one million, one hundred thirty-one thousand, twenty-one".