221312231134 has 16 divisors (see below), whose sum is σ = 343429527600. Its totient is φ = 106836033024.

The previous prime is 221312231117. The next prime is 221312231141. The reversal of 221312231134 is 431132213122.

It is a junction number, because it is equal to n+sod(n) for n = 221312231099 and 221312231108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1708189 + ... + 1833175.

It is an arithmetic number, because the mean of its divisors is an integer number (21464345475).

Almost surely, 2^221312231134 is an apocalyptic number.

221312231134 is a deficient number, since it is larger than the sum of its proper divisors (122117296466).

221312231134 is a wasteful number, since it uses less digits than its factorization.

221312231134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155547.

The product of its digits is 1728, while the sum is 25.

Adding to 221312231134 its reverse (431132213122), we get a palindrome (652444444256).

The spelling of 221312231134 in words is "two hundred twenty-one billion, three hundred twelve million, two hundred thirty-one thousand, one hundred thirty-four".