31121230230 has 72 divisors (see below), whose sum is σ = 83801794752. Its totient is φ = 8012803008.

The previous prime is 31121230207. The next prime is 31121230267. The reversal of 31121230230 is 3203212113.

31121230230 is a `hidden beast` number, since 311 + 2 + 123 + 0 + 230 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 129894 + ... + 281273.

It is an arithmetic number, because the mean of its divisors is an integer number (1163913816).

Almost surely, 2^31121230230 is an apocalyptic number.

31121230230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31121230230 is an abundant number, since it is smaller than the sum of its proper divisors (52680564522).

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

31121230230 is a wasteful number, since it uses less digits than its factorization.

31121230230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411238 (or 411206 counting only the distinct ones).

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

Adding to 31121230230 its reverse (3203212113), we get a palindrome (34324442343).

The spelling of 31121230230 in words is "thirty-one billion, one hundred twenty-one million, two hundred thirty thousand, two hundred thirty".