221100312232132 has 6 divisors (see below), whose sum is σ = 386925546406238. Its totient is φ = 110550156116064.

The previous prime is 221100312232123. The next prime is 221100312232181. The reversal of 221100312232132 is 231232213001122.

It can be written as a sum of positive squares in only one way, i.e., 193847255793216 + 27253056438916 = 13922904^2 + 5220446^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221100312232097 and 221100312232106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27637539029013 + ... + 27637539029020.

Almost surely, 2^{221100312232132} is an apocalyptic number.

It is an amenable number.

221100312232132 is a deficient number, since it is larger than the sum of its proper divisors (165825234174106).

221100312232132 is a wasteful number, since it uses less digits than its factorization.

221100312232132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55275078058037 (or 55275078058035 counting only the distinct ones).

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

Adding to 221100312232132 its reverse (231232213001122), we get a palindrome (452332525233254).

The spelling of 221100312232132 in words is "two hundred twenty-one trillion, one hundred billion, three hundred twelve million, two hundred thirty-two thousand, one hundred thirty-two".