31020223212131 has 8 divisors (see below), whose sum is σ = 31741962377664. Its totient is φ = 30298499438760.

The previous prime is 31020223212089. The next prime is 31020223212151. The reversal of 31020223212131 is 13121232202013.

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 31020223212131 - 2²⁶ = 31020156103267 is a prime.

It is a super-2 number, since 2×31020223212131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31020223212097 and 31020223212106.

It is not an unprimeable number, because it can be changed into a prime (31020223212151) 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, 280436 + ... + 7881566.

It is an arithmetic number, because the mean of its divisors is an integer number (3967745297208).

Almost surely, 2^{31020223212131} is an apocalyptic number.

31020223212131 is a deficient number, since it is larger than the sum of its proper divisors (721739165533).

31020223212131 is an equidigital number, since it uses as much as digits as its factorization.

31020223212131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7696081.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31020223212131 its reverse (13121232202013), we get a palindrome (44141455414144).

The spelling of 31020223212131 in words is "thirty-one trillion, twenty billion, two hundred twenty-three million, two hundred twelve thousand, one hundred thirty-one".