221210010222001 has 4 divisors (see below), whose sum is σ = 221230944273472. Its totient is φ = 221189076170532.

The previous prime is 221210010221987. The next prime is 221210010222049. The reversal of 221210010222001 is 100222010012122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221210010222001 - 2⁷ = 221210010221873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221210010222301) 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, 10467009885 + ... + 10467031018.

It is an arithmetic number, because the mean of its divisors is an integer number (55307736068368).

Almost surely, 2^{221210010222001} is an apocalyptic number.

It is an amenable number.

221210010222001 is a deficient number, since it is larger than the sum of its proper divisors (20934051471).

221210010222001 is a wasteful number, since it uses less digits than its factorization.

221210010222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20934051470.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221210010222001 its reverse (100222010012122), we get a palindrome (321432020234123).

The spelling of 221210010222001 in words is "two hundred twenty-one trillion, two hundred ten billion, ten million, two hundred twenty-two thousand, one".