20021211222 has 16 divisors (see below), whose sum is σ = 40184925552. Its totient is φ = 6649986560.

The previous prime is 20021211211. The next prime is 20021211239. The reversal of 20021211222 is 22211212002.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5935803 + ... + 5939174.

It is an arithmetic number, because the mean of its divisors is an integer number (2511557847).

Almost surely, 2^20021211222 is an apocalyptic number.

20021211222 is an abundant number, since it is smaller than the sum of its proper divisors (20163714330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021211222 is a wasteful number, since it uses less digits than its factorization.

20021211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11875263.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20021211222 its reverse (22211212002), we get a palindrome (42232423224).

The spelling of 20021211222 in words is "twenty billion, twenty-one million, two hundred eleven thousand, two hundred twenty-two".