220121233211220 has 96 divisors (see below), whose sum is σ = 675183577743360. Its totient is φ = 53139448172160.

The previous prime is 220121233211203. The next prime is 220121233211221. The reversal of 220121233211220 is 22112332121022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121233211221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 697576612 + ... + 697892091.

It is an arithmetic number, because the mean of its divisors is an integer number (7033162268160).

Almost surely, 2^{220121233211220} is an apocalyptic number.

220121233211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121233211220 is an abundant number, since it is smaller than the sum of its proper divisors (455062344532140).

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

220121233211220 is a wasteful number, since it uses less digits than its factorization.

220121233211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395468965 (or 1395468963 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 220121233211220 its reverse (22112332121022), we get a palindrome (242233565332242).

The spelling of 220121233211220 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred thirty-three million, two hundred eleven thousand, two hundred twenty".