20021220021202 has 16 divisors (see below), whose sum is σ = 30036365007480. Its totient is φ = 10009098491392.

The previous prime is 20021220021163. The next prime is 20021220021203. The reversal of 20021220021202 is 20212002212002.

It can be written as a sum of positive squares in 4 ways, for example, as 14687665337601 + 5333554683601 = 3832449^2 + 2309449^2 .

It is a super-2 number, since 2×20021220021202² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20021220021203) 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, 600265758 + ... + 600299110.

Almost surely, 2^{20021220021202} is an apocalyptic number.

20021220021202 is a deficient number, since it is larger than the sum of its proper divisors (10015144986278).

20021220021202 is a wasteful number, since it uses less digits than its factorization.

20021220021202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69677.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20021220021202 its reverse (20212002212002), we get a palindrome (40233222233204).

The spelling of 20021220021202 in words is "twenty trillion, twenty-one billion, two hundred twenty million, twenty-one thousand, two hundred two".