31213031002103 has 4 divisors (see below), whose sum is σ = 31213042825008. Its totient is φ = 31213019179200.

The previous prime is 31213031002037. The next prime is 31213031002121. The reversal of 31213031002103 is 30120013031213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31213031002103 - 2⁸ = 31213031001847 is a prime.

It is a super-3 number, since 3×31213031002103³ (a number of 41 digits) contains 333 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 (31213031002003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57878 + ... + 7901228.

It is an arithmetic number, because the mean of its divisors is an integer number (7803260706252).

Almost surely, 2^{31213031002103} is an apocalyptic number.

31213031002103 is a deficient number, since it is larger than the sum of its proper divisors (11822905).

31213031002103 is an equidigital number, since it uses as much as digits as its factorization.

31213031002103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11822904.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31213031002103 its reverse (30120013031213), we get a palindrome (61333044033316).

The spelling of 31213031002103 in words is "thirty-one trillion, two hundred thirteen billion, thirty-one million, two thousand, one hundred three".