221211001012 has 24 divisors (see below), whose sum is σ = 396460662752. Its totient is φ = 107940924000.

The previous prime is 221211000931. The next prime is 221211001019. The reversal of 221211001012 is 210100112122.

It is a junction number, because it is equal to n+sod(n) for n = 221211000983 and 221211001001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211001019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347739 + ... + 750562.

Almost surely, 2^221211001012 is an apocalyptic number.

It is an amenable number.

221211001012 is a deficient number, since it is larger than the sum of its proper divisors (175249661740).

221211001012 is a wasteful number, since it uses less digits than its factorization.

221211001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099519 (or 1099517 counting only the distinct ones).

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

Adding to 221211001012 its reverse (210100112122), we get a palindrome (431311113134).

The spelling of 221211001012 in words is "two hundred twenty-one billion, two hundred eleven million, one thousand, twelve".