221411706517720 has 64 divisors (see below), whose sum is σ = 500395745697120. Its totient is φ = 88170245090304.

The previous prime is 221411706517711. The next prime is 221411706517847. The reversal of 221411706517720 is 27715607114122.

It is a super-4 number, since 4×221411706517720⁴ (a number of 58 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55511802 + ... + 59366518.

Almost surely, 2^{221411706517720} is an apocalyptic number.

221411706517720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221411706517720 is an abundant number, since it is smaller than the sum of its proper divisors (278984039179400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221411706517720 is a wasteful number, since it uses less digits than its factorization.

221411706517720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861124 (or 3861120 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 46.

The spelling of 221411706517720 in words is "two hundred twenty-one trillion, four hundred eleven billion, seven hundred six million, five hundred seventeen thousand, seven hundred twenty".