20121142201 has 4 divisors (see below), whose sum is σ = 20121604900. Its totient is φ = 20120679504.

The previous prime is 20121142157. The next prime is 20121142207. The reversal of 20121142201 is 10224112102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14295789225 + 5825352976 = 119565^2 + 76324^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121142201 - 2⁷ = 20121142073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121142207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158466 + ... + 255643.

It is an arithmetic number, because the mean of its divisors is an integer number (5030401225).

Almost surely, 2^20121142201 is an apocalyptic number.

It is an amenable number.

20121142201 is a deficient number, since it is larger than the sum of its proper divisors (462699).

20121142201 is an equidigital number, since it uses as much as digits as its factorization.

20121142201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462698.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20121142201 its reverse (10224112102), we get a palindrome (30345254303).

The spelling of 20121142201 in words is "twenty billion, one hundred twenty-one million, one hundred forty-two thousand, two hundred one".