31120221011131 has 8 divisors (see below), whose sum is σ = 35655553691360. Its totient is φ = 26607285036288.

The previous prime is 31120221011111. The next prime is 31120221011137. The reversal of 31120221011131 is 13111012202113.

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 31120221011131 - 2¹¹ = 31120221009083 is a prime.

It is a super-2 number, since 2×31120221011131² (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 = 31120221011099 and 31120221011108.

It is not an unprimeable number, because it can be changed into a prime (31120221011137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5599173366 + ... + 5599178923.

It is an arithmetic number, because the mean of its divisors is an integer number (4456944211420).

Almost surely, 2^{31120221011131} is an apocalyptic number.

31120221011131 is a deficient number, since it is larger than the sum of its proper divisors (4535332680229).

31120221011131 is a wasteful number, since it uses less digits than its factorization.

31120221011131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11198352693.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 31120221011131 its reverse (13111012202113), we get a palindrome (44231233213244).

The spelling of 31120221011131 in words is "thirty-one trillion, one hundred twenty billion, two hundred twenty-one million, eleven thousand, one hundred thirty-one".