20121230310 has 32 divisors (see below), whose sum is σ = 48971112192. Its totient is φ = 5290088160.

The previous prime is 20121230279. The next prime is 20121230317. The reversal of 20121230310 is 1303212102.

It is a super-2 number, since 2×20121230310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20121230310.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121230317) 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, 4721164 + ... + 4725423.

It is an arithmetic number, because the mean of its divisors is an integer number (1530347256).

Almost surely, 2^20121230310 is an apocalyptic number.

20121230310 is an abundant number, since it is smaller than the sum of its proper divisors (28849881882).

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

20121230310 is a wasteful number, since it uses less digits than its factorization.

20121230310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9446668.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20121230310 its reverse (1303212102), we get a palindrome (21424442412).

The spelling of 20121230310 in words is "twenty billion, one hundred twenty-one million, two hundred thirty thousand, three hundred ten".