221001221211112 has 16 divisors (see below), whose sum is σ = 414378139970340. Its totient is φ = 110500383885696.

The previous prime is 221001221211077. The next prime is 221001221211137. The reversal of 221001221211112 is 211112122100122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 220988620250596 + 12600960516 = 14865686^2 + 112254^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221001221211112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24160933 + ... + 32027380.

Almost surely, 2^{221001221211112} is an apocalyptic number.

It is an amenable number.

221001221211112 is a deficient number, since it is larger than the sum of its proper divisors (193376918759228).

221001221211112 is a wasteful number, since it uses less digits than its factorization.

221001221211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56679972 (or 56679968 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221001221211112 its reverse (211112122100122), we get a palindrome (432113343311234).

The spelling of 221001221211112 in words is "two hundred twenty-one trillion, one billion, two hundred twenty-one million, two hundred eleven thousand, one hundred twelve".