31321212102030 has 64 divisors (see below), whose sum is σ = 75298524120576. Its totient is φ = 8338146768000.

The previous prime is 31321212101909. The next prime is 31321212102071. The reversal of 31321212102030 is 3020121212313.

It is a super-2 number, since 2×31321212102030² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31321212101988 and 31321212102006.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 176736565 + ... + 176913695.

It is an arithmetic number, because the mean of its divisors is an integer number (1176539439384).

Almost surely, 2^{31321212102030} is an apocalyptic number.

31321212102030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31321212102030 is an abundant number, since it is smaller than the sum of its proper divisors (43977312018546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31321212102030 is a wasteful number, since it uses less digits than its factorization.

31321212102030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187113.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31321212102030 its reverse (3020121212313), we get a palindrome (34341333314343).

The spelling of 31321212102030 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twelve million, one hundred two thousand, thirty".