221312506630 has 8 divisors (see below), whose sum is σ = 398362511952. Its totient is φ = 88525002648.

The previous prime is 221312506603. The next prime is 221312506633. The reversal of 221312506630 is 36605213122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221312506592 and 221312506601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221312506633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11065625322 + ... + 11065625341.

It is an arithmetic number, because the mean of its divisors is an integer number (49795313994).

Almost surely, 2^221312506630 is an apocalyptic number.

221312506630 is a deficient number, since it is larger than the sum of its proper divisors (177050005322).

221312506630 is a wasteful number, since it uses less digits than its factorization.

221312506630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22131250670.

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 221312506630 its reverse (36605213122), we get a palindrome (257917719752).

The spelling of 221312506630 in words is "two hundred twenty-one billion, three hundred twelve million, five hundred six thousand, six hundred thirty".