201211020031 has 24 divisors (see below), whose sum is σ = 233438454144. Its totient is φ = 169868618640.

The previous prime is 201211020013. The next prime is 201211020041. The reversal of 201211020031 is 130020112102.

It is not a de Polignac number, because 201211020031 - 2¹³ = 201211011839 is a prime.

It is a super-2 number, since 2×201211020031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201211019993 and 201211020020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211020041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83454216 + ... + 83456626.

It is an arithmetic number, because the mean of its divisors is an integer number (9726602256).

Almost surely, 2^201211020031 is an apocalyptic number.

201211020031 is a deficient number, since it is larger than the sum of its proper divisors (32227434113).

201211020031 is an frugal number, since it uses more digits than its factorization.

201211020031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259 (or 2880 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 201211020031 its reverse (130020112102), we get a palindrome (331231132133).

The spelling of 201211020031 in words is "two hundred one billion, two hundred eleven million, twenty thousand, thirty-one".