21220022118 has 16 divisors (see below), whose sum is σ = 42829403760. Its totient is φ = 7008447456.

The previous prime is 21220022077. The next prime is 21220022119. The reversal of 21220022118 is 81122002212.

It is a junction number, because it is equal to n+sod(n) for n = 21220022094 and 21220022103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220022119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16222605 + ... + 16223912.

It is an arithmetic number, because the mean of its divisors is an integer number (2676837735).

Almost surely, 2^21220022118 is an apocalyptic number.

21220022118 is an abundant number, since it is smaller than the sum of its proper divisors (21609381642).

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

21220022118 is a wasteful number, since it uses less digits than its factorization.

21220022118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32446631.

The product of its (nonzero) digits is 256, while the sum is 21.

The spelling of 21220022118 in words is "twenty-one billion, two hundred twenty million, twenty-two thousand, one hundred eighteen".