611221219989 has 16 divisors (see below), whose sum is σ = 816319769472. Its totient is φ = 406801963008.

The previous prime is 611221219981. The next prime is 611221219993. The reversal of 611221219989 is 989912122116.

It is not a de Polignac number, because 611221219989 - 2³ = 611221219981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611221219981) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12620829 + ... + 12669165.

It is an arithmetic number, because the mean of its divisors is an integer number (51019985592).

Almost surely, 2^611221219989 is an apocalyptic number.

It is an amenable number.

611221219989 is a deficient number, since it is larger than the sum of its proper divisors (205098549483).

611221219989 is a wasteful number, since it uses less digits than its factorization.

611221219989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55276.

The product of its digits is 279936, while the sum is 51.

The spelling of 611221219989 in words is "six hundred eleven billion, two hundred twenty-one million, two hundred nineteen thousand, nine hundred eighty-nine".