221121020201001 has 16 divisors (see below), whose sum is σ = 312175202040000. Its totient is φ = 138740667580928.

The previous prime is 221121020200991. The next prime is 221121020201023. The reversal of 221121020201001 is 100102020121122.

It is a cyclic number.

It is not a de Polignac number, because 221121020201001 - 2¹⁸ = 221121019938857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221121020201051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26508051 + ... + 33836648.

It is an arithmetic number, because the mean of its divisors is an integer number (19510950127500).

Almost surely, 2^{221121020201001} is an apocalyptic number.

It is an amenable number.

221121020201001 is a deficient number, since it is larger than the sum of its proper divisors (91054181838999).

221121020201001 is a wasteful number, since it uses less digits than its factorization.

221121020201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60416568.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221121020201001 its reverse (100102020121122), we get a palindrome (321223040322123).

The spelling of 221121020201001 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, twenty million, two hundred one thousand, one".