221211102211012 has 12 divisors (see below), whose sum is σ = 387124935334060. Its totient is φ = 110603977829856.

The previous prime is 221211102211009. The next prime is 221211102211027. The reversal of 221211102211012 is 210112201112122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 49490887320576 + 171720214890436 = 7034976^2 + 13104206^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393002523 + ... + 393564994.

Almost surely, 2^{221211102211012} is an apocalyptic number.

It is an amenable number.

221211102211012 is a deficient number, since it is larger than the sum of its proper divisors (165913833123048).

221211102211012 is a wasteful number, since it uses less digits than its factorization.

221211102211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786637830 (or 786637828 counting only the distinct ones).

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

Adding to 221211102211012 its reverse (210112201112122), we get a palindrome (431323303323134).

The spelling of 221211102211012 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred two million, two hundred eleven thousand, twelve".