20021222001211 has 16 divisors (see below), whose sum is σ = 20777493565440. Its totient is φ = 19269376003360.

The previous prime is 20021222001167. The next prime is 20021222001223. The reversal of 20021222001211 is 11210022212002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20021222001211 - 2³⁹ = 19471466187323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20021222001281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33627270 + ... + 34217476.

It is an arithmetic number, because the mean of its divisors is an integer number (1298593347840).

Almost surely, 2^{20021222001211} is an apocalyptic number.

20021222001211 is a deficient number, since it is larger than the sum of its proper divisors (756271564229).

20021222001211 is a wasteful number, since it uses less digits than its factorization.

20021222001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593954.

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

Adding to 20021222001211 its reverse (11210022212002), we get a palindrome (31231244213213).

The spelling of 20021222001211 in words is "twenty trillion, twenty-one billion, two hundred twenty-two million, one thousand, two hundred eleven".