221230200120020 has 72 divisors (see below), whose sum is σ = 574936709485824. Its totient is φ = 70015711678848.

The previous prime is 221230200120019. The next prime is 221230200120077. The reversal of 221230200120020 is 20021002032122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4675170764 + ... + 4675218083.

It is an arithmetic number, because the mean of its divisors is an integer number (7985232076192).

Almost surely, 2^{221230200120020} is an apocalyptic number.

221230200120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221230200120020 is an abundant number, since it is smaller than the sum of its proper divisors (353706509365804).

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

221230200120020 is a wasteful number, since it uses less digits than its factorization.

221230200120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9350388889 (or 9350388874 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 221230200120020 its reverse (20021002032122), we get a palindrome (241251202152142).

The spelling of 221230200120020 in words is "two hundred twenty-one trillion, two hundred thirty billion, two hundred million, one hundred twenty thousand, twenty".