20121295 has 4 divisors (see below), whose sum is σ = 24145560. Its totient is φ = 16097032.

The previous prime is 20121287. The next prime is 20121307. The reversal of 20121295 is 59212102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20121295 - 2³ = 20121287 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2012125 + ... + 2012134.

It is an arithmetic number, because the mean of its divisors is an integer number (6036390).

Almost surely, 2^20121295 is an apocalyptic number.

20121295 is a deficient number, since it is larger than the sum of its proper divisors (4024265).

20121295 is an equidigital number, since it uses as much as digits as its factorization.

20121295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4024264.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 20121295 is about 4485.6766490687. The cubic root of 20121295 is about 271.9893981955.

Adding to 20121295 its reverse (59212102), we get a palindrome (79333397).

The spelling of 20121295 in words is "twenty million, one hundred twenty-one thousand, two hundred ninety-five".