201211323031 has 2 divisors, whose sum is σ = 201211323032. Its totient is φ = 201211323030.

The previous prime is 201211323023. The next prime is 201211323083. The reversal of 201211323031 is 130323112102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201211323031 - 2³ = 201211323023 is a prime.

It is a super-2 number, since 2×201211323031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201211323011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605661515 + 100605661516.

It is an arithmetic number, because the mean of its divisors is an integer number (100605661516).

Almost surely, 2^201211323031 is an apocalyptic number.

201211323031 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211323031 is an equidigital number, since it uses as much as digits as its factorization.

201211323031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 201211323031 its reverse (130323112102), we get a palindrome (331534435133).

The spelling of 201211323031 in words is "two hundred one billion, two hundred eleven million, three hundred twenty-three thousand, thirty-one".