20001220101202 has 8 divisors (see below), whose sum is σ = 30002069356812. Its totient is φ = 10000530315600.

The previous prime is 20001220101173. The next prime is 20001220101209. The reversal of 20001220101202 is 20210102210002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19943557204041 + 57662897161 = 4465821^2 + 240131^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20001220101209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39553449 + ... + 40055932.

Almost surely, 2^{20001220101202} is an apocalyptic number.

20001220101202 is a deficient number, since it is larger than the sum of its proper divisors (10000849255610).

20001220101202 is a wasteful number, since it uses less digits than its factorization.

20001220101202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79735004.

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

Adding to 20001220101202 its reverse (20210102210002), we get a palindrome (40211322311204).

The spelling of 20001220101202 in words is "twenty trillion, one billion, two hundred twenty million, one hundred one thousand, two hundred two".