221222043312 has 40 divisors (see below), whose sum is σ = 572373651456. Its totient is φ = 73626697536.

The previous prime is 221222043311. The next prime is 221222043347. The reversal of 221222043312 is 213340222122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (221222043311) 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, 3530608 + ... + 3592719.

Almost surely, 2^221222043312 is an apocalyptic number.

It is an amenable number.

221222043312 is an abundant number, since it is smaller than the sum of its proper divisors (351151608144).

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

221222043312 is a wasteful number, since it uses less digits than its factorization.

221222043312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7123985 (or 7123979 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 221222043312 its reverse (213340222122), we get a palindrome (434562265434).

The spelling of 221222043312 in words is "two hundred twenty-one billion, two hundred twenty-two million, forty-three thousand, three hundred twelve".