231211121230230 has 64 divisors (see below), whose sum is σ = 566756992327680. Its totient is φ = 60339801509504.

The previous prime is 231211121230217. The next prime is 231211121230231. The reversal of 231211121230230 is 32032121112132.

It is a super-2 number, since 2×231211121230230² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231211121230230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231211121230231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11945332 + ... + 24599048.

It is an arithmetic number, because the mean of its divisors is an integer number (8855578005120).

Almost surely, 2^{231211121230230} is an apocalyptic number.

231211121230230 is an abundant number, since it is smaller than the sum of its proper divisors (335545871097450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231211121230230 is a wasteful number, since it uses less digits than its factorization.

231211121230230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12666733.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 231211121230230 its reverse (32032121112132), we get a palindrome (263243242342362).

The spelling of 231211121230230 in words is "two hundred thirty-one trillion, two hundred eleven billion, one hundred twenty-one million, two hundred thirty thousand, two hundred thirty".