20002211021 has 16 divisors (see below), whose sum is σ = 22055928384. Its totient is φ = 18026959104.

The previous prime is 20002210961. The next prime is 20002211051. The reversal of 20002211021 is 12011220002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20002211021 - 2¹⁴ = 20002194637 is a prime.

It is a super-2 number, since 2×20002211021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002210993 and 20002211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002211051) 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, 3191 + ... + 200036.

It is an arithmetic number, because the mean of its divisors is an integer number (1378495524).

Almost surely, 2^20002211021 is an apocalyptic number.

It is an amenable number.

20002211021 is a deficient number, since it is larger than the sum of its proper divisors (2053717363).

20002211021 is a wasteful number, since it uses less digits than its factorization.

20002211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203420.

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

Adding to 20002211021 its reverse (12011220002), we get a palindrome (32013431023).

The spelling of 20002211021 in words is "twenty billion, two million, two hundred eleven thousand, twenty-one".