31113212123 has 8 divisors (see below), whose sum is σ = 35603962848. Its totient is φ = 26633962944.

The previous prime is 31113212089. The next prime is 31113212131. The reversal of 31113212123 is 32121231113.

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 not a de Polignac number, because 31113212123 - 2⁶ = 31113212059 is a prime.

It is a super-2 number, since 2×31113212123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31113212095 and 31113212104.

It is not an unprimeable number, because it can be changed into a prime (31113212173) 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, 2869586 + ... + 2880407.

It is an arithmetic number, because the mean of its divisors is an integer number (4450495356).

Almost surely, 2^31113212123 is an apocalyptic number.

31113212123 is a deficient number, since it is larger than the sum of its proper divisors (4490750725).

31113212123 is an equidigital number, since it uses as much as digits as its factorization.

31113212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5750773.

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

Adding to 31113212123 its reverse (32121231113), we get a palindrome (63234443236).

The spelling of 31113212123 in words is "thirty-one billion, one hundred thirteen million, two hundred twelve thousand, one hundred twenty-three".