31340042100220 has 24 divisors (see below), whose sum is σ = 75216101040864. Its totient is φ = 10745157291456.

The previous prime is 31340042100181. The next prime is 31340042100221. The reversal of 31340042100220 is 2200124004313.

It is a junction number, because it is equal to n+sod(n) for n = 31340042100191 and 31340042100200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31340042100221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111928721647 + ... + 111928721926.

It is an arithmetic number, because the mean of its divisors is an integer number (3134004210036).

Almost surely, 2^{31340042100220} is an apocalyptic number.

It is an amenable number.

31340042100220 is an abundant number, since it is smaller than the sum of its proper divisors (43876058940644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31340042100220 is a wasteful number, since it uses less digits than its factorization.

31340042100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223857443589 (or 223857443587 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31340042100220 its reverse (2200124004313), we get a palindrome (33540166104533).

The spelling of 31340042100220 in words is "thirty-one trillion, three hundred forty billion, forty-two million, one hundred thousand, two hundred twenty".