20122122220 has 48 divisors (see below), whose sum is σ = 43336581120. Its totient is φ = 7844548544.

The previous prime is 20122122211. The next prime is 20122122239. The reversal of 20122122220 is 2222122102.

It is a junction number, because it is equal to n+sod(n) for n = 20122122194 and 20122122203.

It is an unprimeable number.

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, 179877 + ... + 269443.

It is an arithmetic number, because the mean of its divisors is an integer number (902845440).

Almost surely, 2^20122122220 is an apocalyptic number.

20122122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122122220 is an abundant number, since it is smaller than the sum of its proper divisors (23214458900).

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

20122122220 is a wasteful number, since it uses less digits than its factorization.

20122122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89862 (or 89860 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20122122220 its reverse (2222122102), we get a palindrome (22344244322).

The spelling of 20122122220 in words is "twenty billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty".