31211230243142 has 32 divisors (see below), whose sum is σ = 47968305151008. Its totient is φ = 15222756197376.

The previous prime is 31211230243121. The next prime is 31211230243157. The reversal of 31211230243142 is 24134203211213.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243672788 + ... + 243800840.

It is an arithmetic number, because the mean of its divisors is an integer number (1499009535969).

Almost surely, 2^{31211230243142} is an apocalyptic number.

31211230243142 is a deficient number, since it is larger than the sum of its proper divisors (16757074907866).

31211230243142 is a wasteful number, since it uses less digits than its factorization.

31211230243142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131784.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 31211230243142 its reverse (24134203211213), we get a palindrome (55345433454355).

The spelling of 31211230243142 in words is "thirty-one trillion, two hundred eleven billion, two hundred thirty million, two hundred forty-three thousand, one hundred forty-two".