221001110212 has 6 divisors (see below), whose sum is σ = 386751942878. Its totient is φ = 110500555104.

The previous prime is 221001110179. The next prime is 221001110251. The reversal of 221001110212 is 212011100122.

It can be written as a sum of positive squares in only one way, i.e., 215698940356 + 5302169856 = 464434^2 + 72816^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221001110192 and 221001110201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27625138773 + ... + 27625138780.

Almost surely, 2^221001110212 is an apocalyptic number.

It is an amenable number.

221001110212 is a deficient number, since it is larger than the sum of its proper divisors (165750832666).

221001110212 is a wasteful number, since it uses less digits than its factorization.

221001110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55250277557 (or 55250277555 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221001110212 its reverse (212011100122), we get a palindrome (433012210334).

The spelling of 221001110212 in words is "two hundred twenty-one billion, one million, one hundred ten thousand, two hundred twelve".