20021222012 has 24 divisors (see below), whose sum is σ = 38280213552. Its totient is φ = 9086774400.

The previous prime is 20021221991. The next prime is 20021222017. The reversal of 20021222012 is 21022212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021222017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315113 + ... + 373280.

It is an arithmetic number, because the mean of its divisors is an integer number (1595008898).

Almost surely, 2^20021222012 is an apocalyptic number.

20021222012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20021222012 is a deficient number, since it is larger than the sum of its proper divisors (18258991540).

20021222012 is a wasteful number, since it uses less digits than its factorization.

20021222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689069 (or 689067 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20021222012 its reverse (21022212002), we get a palindrome (41043434014).

It can be divided in two parts, 200 and 21222012, that added together give a palindrome (21222212).

The spelling of 20021222012 in words is "twenty billion, twenty-one million, two hundred twenty-two thousand, twelve".