222021135346 has 4 divisors (see below), whose sum is σ = 333031703022. Its totient is φ = 111010567672.

The previous prime is 222021135341. The next prime is 222021135353. The reversal of 222021135346 is 643531120222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 643531120222 = 2 ⋅321765560111.

It can be written as a sum of positive squares in only one way, i.e., 181241775625 + 40779359721 = 425725^2 + 201939^2 .

It is not an unprimeable number, because it can be changed into a prime (222021135341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505283835 + ... + 55505283838.

Almost surely, 2^222021135346 is an apocalyptic number.

222021135346 is a deficient number, since it is larger than the sum of its proper divisors (111010567676).

222021135346 is a wasteful number, since it uses less digits than its factorization.

222021135346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111010567675.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 222021135346 its reverse (643531120222), we get a palindrome (865552255568).

The spelling of 222021135346 in words is "two hundred twenty-two billion, twenty-one million, one hundred thirty-five thousand, three hundred forty-six".