231211020033 has 12 divisors (see below), whose sum is σ = 381681683968. Its totient is φ = 132120582840.

The previous prime is 231211020013. The next prime is 231211020037. The reversal of 231211020033 is 330020112132.

It is not a de Polignac number, because 231211020033 - 2¹³ = 231211011841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231211019988 and 231211020015.

It is not an unprimeable number, because it can be changed into a prime (231211020037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1835008033 + ... + 1835008158.

Almost surely, 2^231211020033 is an apocalyptic number.

It is an amenable number.

231211020033 is a deficient number, since it is larger than the sum of its proper divisors (150470663935).

231211020033 is a wasteful number, since it uses less digits than its factorization.

231211020033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670016204 (or 3670016201 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 231211020033 its reverse (330020112132), we get a palindrome (561231132165).

The spelling of 231211020033 in words is "two hundred thirty-one billion, two hundred eleven million, twenty thousand, thirty-three".