31212212230 has 32 divisors (see below), whose sum is σ = 56498977440. Its totient is φ = 12414581760.

The previous prime is 31212212189. The next prime is 31212212231. The reversal of 31212212230 is 3221221213.

It is a junction number, because it is equal to n+sod(n) for n = 31212212198 and 31212212207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212212231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1885590 + ... + 1902070.

It is an arithmetic number, because the mean of its divisors is an integer number (1765593045).

Almost surely, 2^31212212230 is an apocalyptic number.

31212212230 is a deficient number, since it is larger than the sum of its proper divisors (25286765210).

31212212230 is a wasteful number, since it uses less digits than its factorization.

31212212230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17544.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31212212230 its reverse (3221221213), we get a palindrome (34433433443).

The spelling of 31212212230 in words is "thirty-one billion, two hundred twelve million, two hundred twelve thousand, two hundred thirty".