20020021221211 has 16 divisors (see below), whose sum is σ = 21998438985600. Its totient is φ = 18068021496000.

The previous prime is 20020021221149. The next prime is 20020021221223. The reversal of 20020021221211 is 11212212002002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20020021221211 - 2³⁷ = 19882582267739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20020021221251) 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, 26229900 + ... + 26982358.

It is an arithmetic number, because the mean of its divisors is an integer number (1374902436600).

Almost surely, 2^{20020021221211} is an apocalyptic number.

20020021221211 is a deficient number, since it is larger than the sum of its proper divisors (1978417764389).

20020021221211 is a wasteful number, since it uses less digits than its factorization.

20020021221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770010.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20020021221211 its reverse (11212212002002), we get a palindrome (31232233223213).

The spelling of 20020021221211 in words is "twenty trillion, twenty billion, twenty-one million, two hundred twenty-one thousand, two hundred eleven".