31220131331323 has 8 divisors (see below), whose sum is σ = 34978820361840. Its totient is φ = 27614858179680.

The previous prime is 31220131331273. The next prime is 31220131331383. The reversal of 31220131331323 is 32313313102213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31220131331323 - 2⁹ = 31220131330811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31220131331291 and 31220131331300.

It is not an unprimeable number, because it can be changed into a prime (31220131331383) 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, 38353969288 + ... + 38353970101.

It is an arithmetic number, because the mean of its divisors is an integer number (4372352545230).

Almost surely, 2^{31220131331323} is an apocalyptic number.

31220131331323 is a deficient number, since it is larger than the sum of its proper divisors (3758689030517).

31220131331323 is a wasteful number, since it uses less digits than its factorization.

31220131331323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76707939437.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 31220131331323 its reverse (32313313102213), we get a palindrome (63533444433536).

The spelling of 31220131331323 in words is "thirty-one trillion, two hundred twenty billion, one hundred thirty-one million, three hundred thirty-one thousand, three hundred twenty-three".