20121202201 has 4 divisors (see below), whose sum is σ = 20279636992. Its totient is φ = 19962767412.

The previous prime is 20121202151. The next prime is 20121202207. The reversal of 20121202201 is 10220212102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10220212102 = 2 ⋅5110106051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121202201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121202207) 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, 79217205 + ... + 79217458.

It is an arithmetic number, because the mean of its divisors is an integer number (5069909248).

Almost surely, 2^20121202201 is an apocalyptic number.

It is an amenable number.

20121202201 is a deficient number, since it is larger than the sum of its proper divisors (158434791).

20121202201 is a wasteful number, since it uses less digits than its factorization.

20121202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158434790.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20121202201 its reverse (10220212102), we get a palindrome (30341414303).

Subtracting from 20121202201 its reverse (10220212102), we obtain a palindrome (9900990099).

The spelling of 20121202201 in words is "twenty billion, one hundred twenty-one million, two hundred two thousand, two hundred one".