221213310323220 has 72 divisors (see below), whose sum is σ = 671016014541600. Its totient is φ = 58990013311680.

The previous prime is 221213310323167. The next prime is 221213310323231. The reversal of 221213310323220 is 22323013312122.

221213310323220 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 1 + 3 + 310 + 323 + 2 + 20 = 666.

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, 54618735 + ... + 58528905.

Almost surely, 2^{221213310323220} is an apocalyptic number.

221213310323220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221213310323220 is an abundant number, since it is smaller than the sum of its proper divisors (449802704218380).

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

221213310323220 is a wasteful number, since it uses less digits than its factorization.

221213310323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224485 (or 4224480 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 221213310323220 its reverse (22323013312122), we get a palindrome (243536323635342).

The spelling of 221213310323220 in words is "two hundred twenty-one trillion, two hundred thirteen billion, three hundred ten million, three hundred twenty-three thousand, two hundred twenty".