222606407761921 has 8 divisors (see below), whose sum is σ = 226288439700840. Its totient is φ = 218954189847168.

The previous prime is 222606407761891. The next prime is 222606407761931. The reversal of 222606407761921 is 129167704606222.

It can be written as a sum of positive squares in 4 ways, for example, as 53996572311696 + 168609835450225 = 7348236^2 + 12984985^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 222606407761921 - 2⁵ = 222606407761889 is a prime.

It is a super-2 number, since 2×222606407761921² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222606407761931) 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, 7453490986 + ... + 7453520851.

It is an arithmetic number, because the mean of its divisors is an integer number (28286054962605).

Almost surely, 2^{222606407761921} is an apocalyptic number.

It is an amenable number.

222606407761921 is a deficient number, since it is larger than the sum of its proper divisors (3682031938919).

222606407761921 is a wasteful number, since it uses less digits than its factorization.

222606407761921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14907012083.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 222606407761921 in words is "two hundred twenty-two trillion, six hundred six billion, four hundred seven million, seven hundred sixty-one thousand, nine hundred twenty-one".