20121025315 has 32 divisors (see below), whose sum is σ = 25434622080. Its totient is φ = 15260544000.

The previous prime is 20121025313. The next prime is 20121025319. The reversal of 20121025315 is 51352012102.

It is not a de Polignac number, because 20121025315 - 2¹ = 20121025313 is a prime.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9867066 + ... + 9869104.

It is an arithmetic number, because the mean of its divisors is an integer number (794831940).

Almost surely, 2^20121025315 is an apocalyptic number.

20121025315 is a deficient number, since it is larger than the sum of its proper divisors (5313596765).

20121025315 is a wasteful number, since it uses less digits than its factorization.

20121025315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3423.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 20121025315 its reverse (51352012102), we get a palindrome (71473037417).

The spelling of 20121025315 in words is "twenty billion, one hundred twenty-one million, twenty-five thousand, three hundred fifteen".