31212131342 has 32 divisors (see below), whose sum is σ = 56664204480. Its totient is φ = 12587489280.

The previous prime is 31212131341. The next prime is 31212131381. The reversal of 31212131342 is 24313121213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212131341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2077634 + ... + 2092602.

It is an arithmetic number, because the mean of its divisors is an integer number (1770756390).

Almost surely, 2^31212131342 is an apocalyptic number.

31212131342 is a deficient number, since it is larger than the sum of its proper divisors (25452073138).

31212131342 is a wasteful number, since it uses less digits than its factorization.

31212131342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23756.

The product of its digits is 864, while the sum is 23.

Adding to 31212131342 its reverse (24313121213), we get a palindrome (55525252555).

The spelling of 31212131342 in words is "thirty-one billion, two hundred twelve million, one hundred thirty-one thousand, three hundred forty-two".