3121243031 has 8 divisors (see below), whose sum is σ = 3301094400. Its totient is φ = 2942949240.

The previous prime is 3121243019. The next prime is 3121243043. The reversal of 3121243031 is 1303421213.

3121243031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3121243019) and next prime (3121243043).

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-3121243031 is a prime.

It is a super-2 number, since 2×3121243031² = 19484316117132133922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121242994 and 3121243012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121243331) 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, 385271 + ... + 393288.

It is an arithmetic number, because the mean of its divisors is an integer number (412636800).

Almost surely, 2^3121243031 is an apocalyptic number.

3121243031 is a deficient number, since it is larger than the sum of its proper divisors (179851369).

3121243031 is a wasteful number, since it uses less digits than its factorization.

3121243031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778789.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 3121243031 is about 55868.0859793854. The cubic root of 3121243031 is about 1461.4227438113.

Adding to 3121243031 its reverse (1303421213), we get a palindrome (4424664244).

The spelling of 3121243031 in words is "three billion, one hundred twenty-one million, two hundred forty-three thousand, thirty-one".