20121095 has 8 divisors (see below), whose sum is σ = 25416240. Its totient is φ = 15249600.

The previous prime is 20121091. The next prime is 20121097. The reversal of 20121095 is 59012102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20121095 - 2² = 20121091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105806 + ... + 105995.

It is an arithmetic number, because the mean of its divisors is an integer number (3177030).

Almost surely, 2^20121095 is an apocalyptic number.

20121095 is a deficient number, since it is larger than the sum of its proper divisors (5295145).

20121095 is a wasteful number, since it uses less digits than its factorization.

20121095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211825.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 20121095 is about 4485.6543558326. The cubic root of 20121095 is about 271.9884970265.

Adding to 20121095 its reverse (59012102), we get a palindrome (79133197).

The spelling of 20121095 in words is "twenty million, one hundred twenty-one thousand, ninety-five".