31220111030013 has 8 divisors (see below), whose sum is σ = 46252016340800. Its totient is φ = 20813407353324.

The previous prime is 31220111029969. The next prime is 31220111030023. The reversal of 31220111030013 is 31003011102213.

31220111030013 is a `hidden beast` number, since 31 + 220 + 1 + 110 + 300 + 1 + 3 = 666.

It is not a de Polignac number, because 31220111030013 - 2⁹ = 31220111029501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220111030023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578150204233 + ... + 578150204286.

It is an arithmetic number, because the mean of its divisors is an integer number (5781502042600).

Almost surely, 2^{31220111030013} is an apocalyptic number.

It is an amenable number.

31220111030013 is a deficient number, since it is larger than the sum of its proper divisors (15031905310787).

31220111030013 is a wasteful number, since it uses less digits than its factorization.

31220111030013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156300408528 (or 1156300408522 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31220111030013 its reverse (31003011102213), we get a palindrome (62223122132226).

The spelling of 31220111030013 in words is "thirty-one trillion, two hundred twenty billion, one hundred eleven million, thirty thousand, thirteen".