31212103133230 has 32 divisors (see below), whose sum is σ = 59448348610560. Its totient is φ = 11765818968480.

The previous prime is 31212103133201. The next prime is 31212103133231. The reversal of 31212103133230 is 3233130121213.

It is a junction number, because it is equal to n+sod(n) for n = 31212103133195 and 31212103133204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212103133231) 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, 430000954 + ... + 430073533.

It is an arithmetic number, because the mean of its divisors is an integer number (1857760894080).

Almost surely, 2^{31212103133230} is an apocalyptic number.

31212103133230 is a deficient number, since it is larger than the sum of its proper divisors (28236245477330).

31212103133230 is a wasteful number, since it uses less digits than its factorization.

31212103133230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860074704.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31212103133230 its reverse (3233130121213), we get a palindrome (34445233254443).

The spelling of 31212103133230 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, one hundred thirty-three thousand, two hundred thirty".