31020232212321 has 16 divisors (see below), whose sum is σ = 45130679558400. Its totient is φ = 18795831653520.

The previous prime is 31020232212311. The next prime is 31020232212323. The reversal of 31020232212321 is 12321223202013.

It is not a de Polignac number, because 31020232212321 - 2¹¹ = 31020232210273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31020232212291 and 31020232212300.

It is not an unprimeable number, because it can be changed into a prime (31020232212323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107580871 + ... + 107868828.

It is an arithmetic number, because the mean of its divisors is an integer number (2820667472400).

Almost surely, 2^{31020232212321} is an apocalyptic number.

It is an amenable number.

31020232212321 is a deficient number, since it is larger than the sum of its proper divisors (14110447346079).

31020232212321 is a wasteful number, since it uses less digits than its factorization.

31020232212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215454076.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31020232212321 its reverse (12321223202013), we get a palindrome (43341455414334).

It can be divided in two parts, 310202 and 32212321, that added together give a palindrome (32522523).

The spelling of 31020232212321 in words is "thirty-one trillion, twenty billion, two hundred thirty-two million, two hundred twelve thousand, three hundred twenty-one".