31321020302030 has 16 divisors (see below), whose sum is σ = 56378243217024. Its totient is φ = 12528317748960.

The previous prime is 31321020302009. The next prime is 31321020302057. The reversal of 31321020302030 is 3020302012313.

It is a junction number, because it is equal to n+sod(n) for n = 31321020301993 and 31321020302011.

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 7 ways as a sum of consecutive naturals, for example, 9831806 + ... + 12621665.

It is an arithmetic number, because the mean of its divisors is an integer number (3523640201064).

Almost surely, 2^{31321020302030} is an apocalyptic number.

31321020302030 is a deficient number, since it is larger than the sum of its proper divisors (25057222914994).

31321020302030 is a wasteful number, since it uses less digits than its factorization.

31321020302030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22592971.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31321020302030 its reverse (3020302012313), we get a palindrome (34341322314343).

The spelling of 31321020302030 in words is "thirty-one trillion, three hundred twenty-one billion, twenty million, three hundred two thousand, thirty".