20002221101 has 16 divisors (see below), whose sum is σ = 22036938240. Its totient is φ = 18070691760.

The previous prime is 20002221067. The next prime is 20002221103. The reversal of 20002221101 is 10112220002.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20002221101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002221103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75506 + ... + 213788.

It is an arithmetic number, because the mean of its divisors is an integer number (1377308640).

Almost surely, 2^20002221101 is an apocalyptic number.

It is an amenable number.

20002221101 is a deficient number, since it is larger than the sum of its proper divisors (2034717139).

20002221101 is a wasteful number, since it uses less digits than its factorization.

20002221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138656.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20002221101 its reverse (10112220002), we get a palindrome (30114441103).

The spelling of 20002221101 in words is "twenty billion, two million, two hundred twenty-one thousand, one hundred one".