221212132231 has 8 divisors (see below), whose sum is σ = 223948609200. Its totient is φ = 218486366400.

The previous prime is 221212132177. The next prime is 221212132237. The reversal of 221212132231 is 132231212122.

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 221212132231 - 2²⁷ = 221077914503 is a prime.

It is a super-2 number, since 2×221212132231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212132237) 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, 2636221 + ... + 2718838.

It is an arithmetic number, because the mean of its divisors is an integer number (27993576150).

Almost surely, 2^221212132231 is an apocalyptic number.

221212132231 is a deficient number, since it is larger than the sum of its proper divisors (2736476969).

221212132231 is a wasteful number, since it uses less digits than its factorization.

221212132231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5355569.

The product of its digits is 576, while the sum is 22.

Adding to 221212132231 its reverse (132231212122), we get a palindrome (353443344353).

The spelling of 221212132231 in words is "two hundred twenty-one billion, two hundred twelve million, one hundred thirty-two thousand, two hundred thirty-one".