221032312230031 has 4 divisors (see below), whose sum is σ = 221112951529464. Its totient is φ = 220951672930600.

The previous prime is 221032312229959. The next prime is 221032312230047. The reversal of 221032312230031 is 130032213230122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221032312230031 - 2¹¹ = 221032312227983 is a prime.

It is a super-2 number, since 2×221032312230031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221032312229978 and 221032312230005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221032312230061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40319645605 + ... + 40319651086.

It is an arithmetic number, because the mean of its divisors is an integer number (55278237882366).

Almost surely, 2^{221032312230031} is an apocalyptic number.

221032312230031 is a deficient number, since it is larger than the sum of its proper divisors (80639299433).

221032312230031 is an equidigital number, since it uses as much as digits as its factorization.

221032312230031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80639299432.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 221032312230031 its reverse (130032213230122), we get a palindrome (351064525460153).

The spelling of 221032312230031 in words is "two hundred twenty-one trillion, thirty-two billion, three hundred twelve million, two hundred thirty thousand, thirty-one".