31221030200030 has 32 divisors (see below), whose sum is σ = 62463481358688. Its totient is φ = 11138892419200.

The previous prime is 31221030200027. The next prime is 31221030200039. The reversal of 31221030200030 is 3000203012213.

It is a junction number, because it is equal to n+sod(n) for n = 31221030199981 and 31221030200008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31221030200039) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2677612541 + ... + 2677624200.

It is an arithmetic number, because the mean of its divisors is an integer number (1951983792459).

Almost surely, 2^{31221030200030} is an apocalyptic number.

31221030200030 is an abundant number, since it is smaller than the sum of its proper divisors (31242451158658).

31221030200030 is a wasteful number, since it uses less digits than its factorization.

31221030200030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355236812.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31221030200030 its reverse (3000203012213), we get a palindrome (34221233212243).

The spelling of 31221030200030 in words is "thirty-one trillion, two hundred twenty-one billion, thirty million, two hundred thousand, thirty".