219221212861 has 8 divisors (see below), whose sum is σ = 250548528320. Its totient is φ = 187896397248.

The previous prime is 219221212853. The next prime is 219221212879. The reversal of 219221212861 is 168212122912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 219221212861 - 2³ = 219221212853 is a prime.

It is a super-3 number, since 3×219221212861³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 219221212861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219221212841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433116 + ... + 791221.

It is an arithmetic number, because the mean of its divisors is an integer number (31318566040).

Almost surely, 2^219221212861 is an apocalyptic number.

It is an amenable number.

219221212861 is a deficient number, since it is larger than the sum of its proper divisors (31327315459).

219221212861 is a wasteful number, since it uses less digits than its factorization.

219221212861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249923.

The product of its digits is 13824, while the sum is 37.

The spelling of 219221212861 in words is "two hundred nineteen billion, two hundred twenty-one million, two hundred twelve thousand, eight hundred sixty-one".