21112212101201 has 16 divisors (see below), whose sum is σ = 22962694989696. Its totient is φ = 19294990788096.

The previous prime is 21112212101173. The next prime is 21112212101243. The reversal of 21112212101201 is 10210121221112.

It is a cyclic number.

It is not a de Polignac number, because 21112212101201 - 2²² = 21112207906897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21112212101201.

It is not an unprimeable number, because it can be changed into a prime (21112212101401) 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, 18384320 + ... + 19498913.

It is an arithmetic number, because the mean of its divisors is an integer number (1435168436856).

Almost surely, 2^{21112212101201} is an apocalyptic number.

It is an amenable number.

21112212101201 is a deficient number, since it is larger than the sum of its proper divisors (1850482888495).

21112212101201 is a wasteful number, since it uses less digits than its factorization.

21112212101201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37883672.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112212101201 its reverse (10210121221112), we get a palindrome (31322333322313).

The spelling of 21112212101201 in words is "twenty-one trillion, one hundred twelve billion, two hundred twelve million, one hundred one thousand, two hundred one".