201021131 has 8 divisors (see below), whose sum is σ = 202273344. Its totient is φ = 199773000.

The previous prime is 201021113. The next prime is 201021133. The reversal of 201021131 is 131120102.

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 201021131 - 2²⁶ = 133912267 is a prime.

It is a super-2 number, since 2×201021131² = 80818990217038322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201021133) 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, 221180 + ... + 222086.

It is an arithmetic number, because the mean of its divisors is an integer number (25284168).

Almost surely, 2^201021131 is an apocalyptic number.

201021131 is a deficient number, since it is larger than the sum of its proper divisors (1252213).

201021131 is an equidigital number, since it uses as much as digits as its factorization.

201021131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041.

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

The square root of 201021131 is about 14178.1920920828. The cubic root of 201021131 is about 585.7971269841.

Adding to 201021131 its reverse (131120102), we get a palindrome (332141233).

The spelling of 201021131 in words is "two hundred one million, twenty-one thousand, one hundred thirty-one".