31112202202018 has 48 divisors (see below), whose sum is σ = 59629420451520. Its totient is φ = 12082803584544.

The previous prime is 31112202201953. The next prime is 31112202202019. The reversal of 31112202202018 is 81020220221113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31112202201983 and 31112202202001.

It is not an unprimeable number, because it can be changed into a prime (31112202202019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 363196821 + ... + 363282472.

It is an arithmetic number, because the mean of its divisors is an integer number (1242279592740).

Almost surely, 2^{31112202202018} is an apocalyptic number.

31112202202018 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

31112202202018 is a deficient number, since it is larger than the sum of its proper divisors (28517218249502).

31112202202018 is a wasteful number, since it uses less digits than its factorization.

31112202202018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726479351 (or 726479344 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 31112202202018 in words is "thirty-one trillion, one hundred twelve billion, two hundred two million, two hundred two thousand, eighteen".