20121025316 has 12 divisors (see below), whose sum is σ = 40242050688. Its totient is φ = 8623296552.

The previous prime is 20121025313. The next prime is 20121025319. The reversal of 20121025316 is 61352012102.

It is an interprime number because it is at equal distance from previous prime (20121025313) and next prime (20121025319).

20121025316 is an admirable number.

It is a super-2 number, since 2×20121025316² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20121025291 and 20121025300.

It is not an unprimeable number, because it can be changed into a prime (20121025313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359303996 + ... + 359304051.

It is an arithmetic number, because the mean of its divisors is an integer number (3353504224).

Almost surely, 2^20121025316 is an apocalyptic number.

It is an amenable number.

20121025316 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20121025316 is a wasteful number, since it uses less digits than its factorization.

20121025316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718608058 (or 718608056 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 20121025316 its reverse (61352012102), we get a palindrome (81473037418).

The spelling of 20121025316 in words is "twenty billion, one hundred twenty-one million, twenty-five thousand, three hundred sixteen".