221100201011212 has 6 divisors (see below), whose sum is σ = 386925351769628. Its totient is φ = 110550100505604.

The previous prime is 221100201011197. The next prime is 221100201011231. The reversal of 221100201011212 is 212110102001122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27637525126398 + ... + 27637525126405.

Almost surely, 2^{221100201011212} is an apocalyptic number.

It is an amenable number.

221100201011212 is a deficient number, since it is larger than the sum of its proper divisors (165825150758416).

221100201011212 is a wasteful number, since it uses less digits than its factorization.

221100201011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55275050252807 (or 55275050252805 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221100201011212 its reverse (212110102001122), we get a palindrome (433210303012334).

The spelling of 221100201011212 in words is "two hundred twenty-one trillion, one hundred billion, two hundred one million, eleven thousand, two hundred twelve".