221212001022 has 8 divisors (see below), whose sum is σ = 442424002056. Its totient is φ = 73737333672.

The previous prime is 221212001011. The next prime is 221212001027. The reversal of 221212001022 is 220100212122.

It is a sphenic number, since it is the product of 3 distinct primes.

221212001022 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 221212000992 and 221212001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212001027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18434333413 + ... + 18434333424.

It is an arithmetic number, because the mean of its divisors is an integer number (55303000257).

Almost surely, 2^221212001022 is an apocalyptic number.

221212001022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221212001022 is a wasteful number, since it uses less digits than its factorization.

221212001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36868666842.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221212001022 its reverse (220100212122), we get a palindrome (441312213144).

The spelling of 221212001022 in words is "two hundred twenty-one billion, two hundred twelve million, one thousand, twenty-two".