20021101211202 has 128 divisors (see below), whose sum is σ = 50619032830464. Its totient is φ = 5137137635328.

The previous prime is 20021101211191. The next prime is 20021101211249. The reversal of 20021101211202 is 20211210112002.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 280226628 + ... + 280298064.

It is an arithmetic number, because the mean of its divisors is an integer number (395461193988).

Almost surely, 2^{20021101211202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021101211202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25309516415232).

20021101211202 is an abundant number, since it is smaller than the sum of its proper divisors (30597931619262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021101211202 is a wasteful number, since it uses less digits than its factorization.

20021101211202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85372.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20021101211202 its reverse (20211210112002), we get a palindrome (40232311323204).

The spelling of 20021101211202 in words is "twenty trillion, twenty-one billion, one hundred one million, two hundred eleven thousand, two hundred two".