221211131312001 has 16 divisors (see below), whose sum is σ = 295278204282048. Its totient is φ = 147309099974400.

The previous prime is 221211131311987. The next prime is 221211131312023. The reversal of 221211131312001 is 100213131112122.

It is not a de Polignac number, because 221211131312001 - 2¹³ = 221211131303809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221211131382001) 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, 29418661 + ... + 36164621.

It is an arithmetic number, because the mean of its divisors is an integer number (18454887767628).

Almost surely, 2^{221211131312001} is an apocalyptic number.

It is an amenable number.

221211131312001 is a deficient number, since it is larger than the sum of its proper divisors (74067072970047).

221211131312001 is a wasteful number, since it uses less digits than its factorization.

221211131312001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6758192.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 221211131312001 its reverse (100213131112122), we get a palindrome (321424262424123).

The spelling of 221211131312001 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred thirty-one million, three hundred twelve thousand, one".