221046348478920 has 64 divisors (see below), whose sum is σ = 664523469504000. Its totient is φ = 58822633010688.

The previous prime is 221046348478903. The next prime is 221046348478931. The reversal of 221046348478920 is 29874843640122.

It is a super-2 number, since 2×221046348478920² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 1922753485 + ... + 1922868444.

It is an arithmetic number, because the mean of its divisors is an integer number (10383179211000).

Almost surely, 2^{221046348478920} is an apocalyptic number.

221046348478920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221046348478920 is an abundant number, since it is smaller than the sum of its proper divisors (443477121025080).

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

221046348478920 is a wasteful number, since it uses less digits than its factorization.

221046348478920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3845622422 (or 3845622418 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 60.

The spelling of 221046348478920 in words is "two hundred twenty-one trillion, forty-six billion, three hundred forty-eight million, four hundred seventy-eight thousand, nine hundred twenty".