220121003212320 has 144 divisors (see below), whose sum is σ = 806586247571328. Its totient is φ = 50313372157440.

The previous prime is 220121003212249. The next prime is 220121003212321. The reversal of 220121003212320 is 23212300121022.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (220121003212321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4679419576 + ... + 4679466615.

It is an arithmetic number, because the mean of its divisors is an integer number (5601293385912).

Almost surely, 2^{220121003212320} is an apocalyptic number.

220121003212320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121003212320 is an abundant number, since it is smaller than the sum of its proper divisors (586465244359008).

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

220121003212320 is a wasteful number, since it uses less digits than its factorization.

220121003212320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9358886223 (or 9358886208 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 220121003212320 its reverse (23212300121022), we get a palindrome (243333303333342).

The spelling of 220121003212320 in words is "two hundred twenty trillion, one hundred twenty-one billion, three million, two hundred twelve thousand, three hundred twenty".