31021230221330 has 32 divisors (see below), whose sum is σ = 56556255974400. Its totient is φ = 12248989676352.

The previous prime is 31021230221329. The next prime is 31021230221339. The reversal of 31021230221330 is 3312203212013.

It is a junction number, because it is equal to n+sod(n) for n = 31021230221296 and 31021230221305.

It is not an unprimeable number, because it can be changed into a prime (31021230221339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84464 + ... + 7877156.

It is an arithmetic number, because the mean of its divisors is an integer number (1767382999200).

Almost surely, 2^{31021230221330} is an apocalyptic number.

31021230221330 is a deficient number, since it is larger than the sum of its proper divisors (25535025753070).

31021230221330 is a wasteful number, since it uses less digits than its factorization.

31021230221330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7797818.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31021230221330 its reverse (3312203212013), we get a palindrome (34333433433343).

The spelling of 31021230221330 in words is "thirty-one trillion, twenty-one billion, two hundred thirty million, two hundred twenty-one thousand, three hundred thirty".