20122222222220 has 24 divisors (see below), whose sum is σ = 42262644706800. Its totient is φ = 8047750214592.

The previous prime is 20122222222169. The next prime is 20122222222303. The reversal of 20122222222220 is 2222222222102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71022230 + ... + 71304989.

It is an arithmetic number, because the mean of its divisors is an integer number (1760943529450).

Almost surely, 2^{20122222222220} is an apocalyptic number.

20122222222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122222222220 is an abundant number, since it is smaller than the sum of its proper divisors (22140422484580).

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

20122222222220 is a wasteful number, since it uses less digits than its factorization.

20122222222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142334297 (or 142334295 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 20122222222220 its reverse (2222222222102), we get a palindrome (22344444444322).

The spelling of 20122222222220 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty".