20022221012 has 12 divisors (see below), whose sum is σ = 35385807156. Its totient is φ = 9911990400.

The previous prime is 20022220993. The next prime is 20022221029. The reversal of 20022221012 is 21012222002.

It can be written as a sum of positive squares in 2 ways, for example, as 17467322896 + 2554898116 = 132164^2 + 50546^2 .

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 3 ways as a sum of consecutive naturals, for example, 24779573 + ... + 24780380.

It is an arithmetic number, because the mean of its divisors is an integer number (2948817263).

Almost surely, 2^20022221012 is an apocalyptic number.

It is an amenable number.

20022221012 is a deficient number, since it is larger than the sum of its proper divisors (15363586144).

20022221012 is a wasteful number, since it uses less digits than its factorization.

20022221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49560058 (or 49560056 counting only the distinct ones).

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

Adding to 20022221012 its reverse (21012222002), we get a palindrome (41034443014).

The spelling of 20022221012 in words is "twenty billion, twenty-two million, two hundred twenty-one thousand, twelve".