201211031 has 8 divisors (see below), whose sum is σ = 243482400. Its totient is φ = 162321408.

The previous prime is 201211027. The next prime is 201211033. The reversal of 201211031 is 130112102.

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 201211031 - 2² = 201211027 is a prime.

It is a super-2 number, since 2×201211031² = 80971757992165922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211033) 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, 845306 + ... + 845543.

It is an arithmetic number, because the mean of its divisors is an integer number (30435300).

Almost surely, 2^201211031 is an apocalyptic number.

201211031 is a deficient number, since it is larger than the sum of its proper divisors (42271369).

201211031 is a wasteful number, since it uses less digits than its factorization.

201211031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690873.

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

The square root of 201211031 is about 14184.8874158380. The cubic root of 201211031 is about 585.9815319150.

Adding to 201211031 its reverse (130112102), we get a palindrome (331323133).

The spelling of 201211031 in words is "two hundred one million, two hundred eleven thousand, thirty-one".