222073237026721 has 4 divisors (see below), whose sum is σ = 222276414737812. Its totient is φ = 221870059315632.

The previous prime is 222073237026713. The next prime is 222073237026733. The reversal of 222073237026721 is 127620732370222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145941766164496 + 76131470862225 = 12080636^2 + 8725335^2 .

It is a cyclic number.

It is not a de Polignac number, because 222073237026721 - 2³ = 222073237026713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222073237024721) 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, 101588853906 + ... + 101588856091.

It is an arithmetic number, because the mean of its divisors is an integer number (55569103684453).

Almost surely, 2^{222073237026721} is an apocalyptic number.

It is an amenable number.

222073237026721 is a deficient number, since it is larger than the sum of its proper divisors (203177711091).

222073237026721 is a wasteful number, since it uses less digits than its factorization.

222073237026721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203177711090.

The product of its (nonzero) digits is 1185408, while the sum is 46.

Adding to 222073237026721 its reverse (127620732370222), we get a palindrome (349693969396943).

The spelling of 222073237026721 in words is "two hundred twenty-two trillion, seventy-three billion, two hundred thirty-seven million, twenty-six thousand, seven hundred twenty-one".