20021220110101 has 24 divisors (see below), whose sum is σ = 22950416945792. Its totient is φ = 17109431712000.

The previous prime is 20021220110081. The next prime is 20021220110107. The reversal of 20021220110101 is 10101102212002.

It is not a de Polignac number, because 20021220110101 - 2¹¹ = 20021220108053 is a prime.

It is a super-2 number, since 2×20021220110101² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021220110107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3141565951 + ... + 3141572323.

Almost surely, 2^{20021220110101} is an apocalyptic number.

It is an amenable number.

20021220110101 is a deficient number, since it is larger than the sum of its proper divisors (2929196835691).

20021220110101 is an frugal number, since it uses more digits than its factorization.

20021220110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9973 (or 9572 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021220110101 its reverse (10101102212002), we get a palindrome (30122322322103).

The spelling of 20021220110101 in words is "twenty trillion, twenty-one billion, two hundred twenty million, one hundred ten thousand, one hundred one".