31302013021230 has 192 divisors, whose sum is σ = 87794840224512. Its totient is φ = 7121624348160.

The previous prime is 31302013021211. The next prime is 31302013021243. The reversal of 31302013021230 is 3212031020313.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 31302013021197 and 31302013021206.

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 95 ways as a sum of consecutive naturals, for example, 2122594717 + ... + 2122609463.

It is an arithmetic number, because the mean of its divisors is an integer number (457264792836).

Almost surely, 2^{31302013021230} is an apocalyptic number.

31302013021230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31302013021230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43897420112256).

31302013021230 is an abundant number, since it is smaller than the sum of its proper divisors (56492827203282).

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

31302013021230 is a wasteful number, since it uses less digits than its factorization.

31302013021230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21359 (or 21352 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31302013021230 its reverse (3212031020313), we get a palindrome (34514044041543).

The spelling of 31302013021230 in words is "thirty-one trillion, three hundred two billion, thirteen million, twenty-one thousand, two hundred thirty".