2201210001221 has 32 divisors (see below), whose sum is σ = 2890638566400. Its totient is φ = 1623922577280.

The previous prime is 2201210001209. The next prime is 2201210001229. The reversal of 2201210001221 is 1221000121022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2201210001221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201210001196 and 2201210001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201210001229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1833641 + ... + 2786513.

It is an arithmetic number, because the mean of its divisors is an integer number (90332455200).

Almost surely, 2^{2201210001221} is an apocalyptic number.

It is an amenable number.

2201210001221 is a deficient number, since it is larger than the sum of its proper divisors (689428565179).

2201210001221 is a wasteful number, since it uses less digits than its factorization.

2201210001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954489.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2201210001221 its reverse (1221000121022), we get a palindrome (3422210122243).

The spelling of 2201210001221 in words is "two trillion, two hundred one billion, two hundred ten million, one thousand, two hundred twenty-one".