220121001012320 has 24 divisors (see below), whose sum is σ = 520035864891984. Its totient is φ = 88048400404864.

The previous prime is 220121001012313. The next prime is 220121001012347. The reversal of 220121001012320 is 23210100121022.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687878128004 + ... + 687878128323.

It is an arithmetic number, because the mean of its divisors is an integer number (21668161037166).

Almost surely, 2^{220121001012320} is an apocalyptic number.

220121001012320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121001012320 is an abundant number, since it is smaller than the sum of its proper divisors (299914863879664).

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

220121001012320 is a wasteful number, since it uses less digits than its factorization.

220121001012320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375756256342 (or 1375756256334 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 220121001012320 its reverse (23210100121022), we get a palindrome (243331101133342).

The spelling of 220121001012320 in words is "two hundred twenty trillion, one hundred twenty-one billion, one million, twelve thousand, three hundred twenty".