21220022214 has 24 divisors (see below), whose sum is σ = 45981544752. Its totient is φ = 7072597680.

The previous prime is 21220022209. The next prime is 21220022231. The reversal of 21220022214 is 41222002212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130312 + ... + 243764.

It is an arithmetic number, because the mean of its divisors is an integer number (1915897698).

Almost surely, 2^21220022214 is an apocalyptic number.

21220022214 is an abundant number, since it is smaller than the sum of its proper divisors (24761522538).

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

21220022214 is a wasteful number, since it uses less digits than its factorization.

21220022214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123852 (or 123849 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21220022214 its reverse (41222002212), we get a palindrome (62442024426).

The spelling of 21220022214 in words is "twenty-one billion, two hundred twenty million, twenty-two thousand, two hundred fourteen".