211221012210001 has 8 divisors (see below), whose sum is σ = 212006872022400. Its totient is φ = 210435157224720.

The previous prime is 211221012209981. The next prime is 211221012210007. The reversal of 211221012210001 is 100012210122112.

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 211221012210001 - 2⁵ = 211221012209969 is a prime.

It is a super-2 number, since 2×211221012210001² (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 (211221012210007) 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, 103259910 + ... + 105285568.

It is an arithmetic number, because the mean of its divisors is an integer number (26500859002800).

Almost surely, 2^{211221012210001} is an apocalyptic number.

It is an amenable number.

211221012210001 is a deficient number, since it is larger than the sum of its proper divisors (785859812399).

211221012210001 is a wasteful number, since it uses less digits than its factorization.

211221012210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413559.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211221012210001 its reverse (100012210122112), we get a palindrome (311233222332113).

The spelling of 211221012210001 in words is "two hundred eleven trillion, two hundred twenty-one billion, twelve million, two hundred ten thousand, one".