31212103100231 has 8 divisors (see below), whose sum is σ = 31503964325904. Its totient is φ = 30920244825280.

The previous prime is 31212103100209. The next prime is 31212103100237. The reversal of 31212103100231 is 13200130121213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31212103100231 is a prime.

It is a super-2 number, since 2×31212103100231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212103100237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24550781 + ... + 25790793.

It is an arithmetic number, because the mean of its divisors is an integer number (3937995540738).

Almost surely, 2^{31212103100231} is an apocalyptic number.

31212103100231 is a deficient number, since it is larger than the sum of its proper divisors (291861225673).

31212103100231 is a wasteful number, since it uses less digits than its factorization.

31212103100231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475361.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31212103100231 its reverse (13200130121213), we get a palindrome (44412233221444).

The spelling of 31212103100231 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, one hundred thousand, two hundred thirty-one".