31211111422 has 4 divisors (see below), whose sum is σ = 46816667136. Its totient is φ = 15605555710.

The previous prime is 31211111419. The next prime is 31211111423. The reversal of 31211111422 is 22411111213.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31211111422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211111423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7802777854 + ... + 7802777857.

It is an arithmetic number, because the mean of its divisors is an integer number (11704166784).

Almost surely, 2^31211111422 is an apocalyptic number.

31211111422 is a deficient number, since it is larger than the sum of its proper divisors (15605555714).

31211111422 is a wasteful number, since it uses less digits than its factorization.

31211111422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15605555713.

The product of its digits is 96, while the sum is 19.

Adding to 31211111422 its reverse (22411111213), we get a palindrome (53622222635).

The spelling of 31211111422 in words is "thirty-one billion, two hundred eleven million, one hundred eleven thousand, four hundred twenty-two".