221211340042001 has 8 divisors (see below), whose sum is σ = 226187221270824. Its totient is φ = 216265165567360.

The previous prime is 221211340041961. The next prime is 221211340042003. The reversal of 221211340042001 is 100240043112122.

It can be written as a sum of positive squares in 4 ways, for example, as 36225471937600 + 184985868104401 = 6018760^2 + 13600951^2 .

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 221211340042001 - 2¹⁴ = 221211340025617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221211340042003) 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, 7426673486 + ... + 7426703271.

It is an arithmetic number, because the mean of its divisors is an integer number (28273402658853).

Almost surely, 2^{221211340042001} is an apocalyptic number.

It is an amenable number.

221211340042001 is a deficient number, since it is larger than the sum of its proper divisors (4975881228823).

221211340042001 is a wasteful number, since it uses less digits than its factorization.

221211340042001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14853377091.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 221211340042001 its reverse (100240043112122), we get a palindrome (321451383154123).

The spelling of 221211340042001 in words is "two hundred twenty-one trillion, two hundred eleven billion, three hundred forty million, forty-two thousand, one".