20002121222211 has 6 divisors (see below), whose sum is σ = 28891952876540. Its totient is φ = 13334747481468.

The previous prime is 20002121222129. The next prime is 20002121222353. The reversal of 20002121222211 is 11222212120002.

It is a happy number.

20002121222211 is a `hidden beast` number, since 20 + 0 + 0 + 212 + 1 + 222 + 211 = 666.

It is not a de Polignac number, because 20002121222211 - 2¹⁸ = 20002120960067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002121222411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111228956781 + ... + 1111228956798.

Almost surely, 2^{20002121222211} is an apocalyptic number.

20002121222211 is a deficient number, since it is larger than the sum of its proper divisors (8889831654329).

20002121222211 is a wasteful number, since it uses less digits than its factorization.

20002121222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222457913585 (or 2222457913582 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20002121222211 its reverse (11222212120002), we get a palindrome (31224333342213).

The spelling of 20002121222211 in words is "twenty trillion, two billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred eleven".