20002222021211 has 16 divisors (see below), whose sum is σ = 20199528407520. Its totient is φ = 19805280337920.

The previous prime is 20002222021193. The next prime is 20002222021247. The reversal of 20002222021211 is 11212022220002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20002222021211 - 2²⁶ = 20002154912347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20002222021211.

It is not an unprimeable number, because it can be changed into a prime (20002222021711) 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, 598798436 + ... + 598831838.

It is an arithmetic number, because the mean of its divisors is an integer number (1262470525470).

Almost surely, 2^{20002222021211} is an apocalyptic number.

20002222021211 is a deficient number, since it is larger than the sum of its proper divisors (197306386309).

20002222021211 is a wasteful number, since it uses less digits than its factorization.

20002222021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38686.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20002222021211 its reverse (11212022220002), we get a palindrome (31214244241213).

The spelling of 20002222021211 in words is "twenty trillion, two billion, two hundred twenty-two million, twenty-one thousand, two hundred eleven".