31230212103 has 6 divisors (see below), whose sum is σ = 45110306384. Its totient is φ = 20820141396.

The previous prime is 31230212099. The next prime is 31230212113. The reversal of 31230212103 is 30121203213.

It is not a de Polignac number, because 31230212103 - 2² = 31230212099 is a prime.

It is a super-2 number, since 2×31230212103² (a number of 22 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 (31230212113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1735011775 + ... + 1735011792.

Almost surely, 2^31230212103 is an apocalyptic number.

31230212103 is a deficient number, since it is larger than the sum of its proper divisors (13880094281).

31230212103 is a wasteful number, since it uses less digits than its factorization.

31230212103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3470023573 (or 3470023570 counting only the distinct ones).

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

Adding to 31230212103 its reverse (30121203213), we get a palindrome (61351415316).

The spelling of 31230212103 in words is "thirty-one billion, two hundred thirty million, two hundred twelve thousand, one hundred three".