221222420030 has 32 divisors (see below), whose sum is σ = 406601727264. Its totient is φ = 86639694336.

The previous prime is 221222420017. The next prime is 221222420039. The reversal of 221222420030 is 30024222122.

It is a junction number, because it is equal to n+sod(n) for n = 221222419984 and 221222420011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222420039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1005992 + ... + 1206011.

It is an arithmetic number, because the mean of its divisors is an integer number (12706303977).

Almost surely, 2^221222420030 is an apocalyptic number.

221222420030 is a deficient number, since it is larger than the sum of its proper divisors (185379307234).

221222420030 is a wasteful number, since it uses less digits than its factorization.

221222420030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212220.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 221222420030 its reverse (30024222122), we get a palindrome (251246642152).

The spelling of 221222420030 in words is "two hundred twenty-one billion, two hundred twenty-two million, four hundred twenty thousand, thirty".