31143132111 has 32 divisors (see below), whose sum is σ = 51118144000. Its totient is φ = 16423461504.

The previous prime is 31143132109. The next prime is 31143132121. The reversal of 31143132111 is 11123134113.

It is not a de Polignac number, because 31143132111 - 2¹ = 31143132109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143132121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1559556 + ... + 1579398.

It is an arithmetic number, because the mean of its divisors is an integer number (1597442000).

Almost surely, 2^31143132111 is an apocalyptic number.

31143132111 is a deficient number, since it is larger than the sum of its proper divisors (19975011889).

31143132111 is a wasteful number, since it uses less digits than its factorization.

31143132111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25615.

The product of its digits is 216, while the sum is 21.

Adding to 31143132111 its reverse (11123134113), we get a palindrome (42266266224).

The spelling of 31143132111 in words is "thirty-one billion, one hundred forty-three million, one hundred thirty-two thousand, one hundred eleven".