221212321131007 has 8 divisors (see below), whose sum is σ = 228840619602240. Its totient is φ = 213584041819680.

The previous prime is 221212321131001. The next prime is 221212321131023. The reversal of 221212321131007 is 700131123212122.

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 221212321131007 - 2²⁷ = 221212186913279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212321131001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21064753 + ... + 29768245.

It is an arithmetic number, because the mean of its divisors is an integer number (28605077450280).

Almost surely, 2^{221212321131007} is an apocalyptic number.

221212321131007 is a deficient number, since it is larger than the sum of its proper divisors (7628298471233).

221212321131007 is an equidigital number, since it uses as much as digits as its factorization.

221212321131007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9579953.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 221212321131007 its reverse (700131123212122), we get a palindrome (921343444343129).

The spelling of 221212321131007 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred twenty-one million, one hundred thirty-one thousand, seven".