31123311220330 has 32 divisors (see below), whose sum is σ = 64027207626624. Its totient is φ = 10670497851456.

The previous prime is 31123311220301. The next prime is 31123311220333. The reversal of 31123311220330 is 3302211332113.

It is a junction number, because it is equal to n+sod(n) for n = 31123311220295 and 31123311220304.

It is not an unprimeable number, because it can be changed into a prime (31123311220333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5183877 + ... + 9440296.

It is an arithmetic number, because the mean of its divisors is an integer number (2000850238332).

Almost surely, 2^{31123311220330} is an apocalyptic number.

31123311220330 is an abundant number, since it is smaller than the sum of its proper divisors (32903896406294).

31123311220330 is a wasteful number, since it uses less digits than its factorization.

31123311220330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14654590.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31123311220330 its reverse (3302211332113), we get a palindrome (34425522552443).

The spelling of 31123311220330 in words is "thirty-one trillion, one hundred twenty-three billion, three hundred eleven million, two hundred twenty thousand, three hundred thirty".