219221117655121 has 16 divisors (see below), whose sum is σ = 228793887970560. Its totient is φ = 209651802275520.

The previous prime is 219221117655101. The next prime is 219221117655161. The reversal of 219221117655121 is 121556711122912.

It is a cyclic number.

It is not a de Polignac number, because 219221117655121 - 2³¹ = 219218970171473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219221117655101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4696330860 + ... + 4696377538.

It is an arithmetic number, because the mean of its divisors is an integer number (14299617998160).

Almost surely, 2^{219221117655121} is an apocalyptic number.

It is an amenable number.

219221117655121 is a deficient number, since it is larger than the sum of its proper divisors (9572770315439).

219221117655121 is a wasteful number, since it uses less digits than its factorization.

219221117655121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79296.

The product of its digits is 151200, while the sum is 46.

The spelling of 219221117655121 in words is "two hundred nineteen trillion, two hundred twenty-one billion, one hundred seventeen million, six hundred fifty-five thousand, one hundred twenty-one".