31121144342 has 16 divisors (see below), whose sum is σ = 48664692864. Its totient is φ = 14909520000.

The previous prime is 31121144309. The next prime is 31121144347. The reversal of 31121144342 is 24344112113.

It is a super-2 number, since 2×31121144342² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121144347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2478659 + ... + 2491182.

It is an arithmetic number, because the mean of its divisors is an integer number (3041543304).

Almost surely, 2^31121144342 is an apocalyptic number.

31121144342 is a deficient number, since it is larger than the sum of its proper divisors (17543548522).

31121144342 is a wasteful number, since it uses less digits than its factorization.

31121144342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4969975.

The product of its digits is 2304, while the sum is 26.

Adding to 31121144342 its reverse (24344112113), we get a palindrome (55465256455).

It can be divided in two parts, 311211 and 44342, that added together give a palindrome (355553).

The spelling of 31121144342 in words is "thirty-one billion, one hundred twenty-one million, one hundred forty-four thousand, three hundred forty-two".