31311121213123 has 8 divisors (see below), whose sum is σ = 31412700296208. Its totient is φ = 31209706366464.

The previous prime is 31311121213109. The next prime is 31311121213139. The reversal of 31311121213123 is 32131212111313.

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 31311121213123 - 2⁹ = 31311121212611 is a prime.

It is a super-2 number, since 2×31311121213123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311121213223) 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, 40677190 + ... + 41439787.

It is an arithmetic number, because the mean of its divisors is an integer number (3926587537026).

Almost surely, 2^{31311121213123} is an apocalyptic number.

31311121213123 is a deficient number, since it is larger than the sum of its proper divisors (101579083085).

31311121213123 is an equidigital number, since it uses as much as digits as its factorization.

31311121213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82118213.

The product of its digits is 648, while the sum is 25.

Adding to 31311121213123 its reverse (32131212111313), we get a palindrome (63442333324436).

The spelling of 31311121213123 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-one million, two hundred thirteen thousand, one hundred twenty-three".