221312033012120 has 32 divisors (see below), whose sum is σ = 524160078188400. Its totient is φ = 83865612509568.

The previous prime is 221312033012113. The next prime is 221312033012149. The reversal of 221312033012120 is 21210330213122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145600020959 + ... + 145600022478.

Almost surely, 2^{221312033012120} is an apocalyptic number.

221312033012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221312033012120 is an abundant number, since it is smaller than the sum of its proper divisors (302848045176280).

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

221312033012120 is a wasteful number, since it uses less digits than its factorization.

221312033012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291200043467 (or 291200043463 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 221312033012120 its reverse (21210330213122), we get a palindrome (242522363225242).

The spelling of 221312033012120 in words is "two hundred twenty-one trillion, three hundred twelve billion, thirty-three million, twelve thousand, one hundred twenty".