121023331111220 has 96 divisors (see below), whose sum is σ = 264330051300000. Its totient is φ = 46488734982144.

The previous prime is 121023331111201. The next prime is 121023331111237. The reversal of 121023331111220 is 22111133320121.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 8920424677264 + 112102906433956 = 2986708^2 + 10587866^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82234406 + ... + 83693154.

It is an arithmetic number, because the mean of its divisors is an integer number (2753438034375).

Almost surely, 2^{121023331111220} is an apocalyptic number.

121023331111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121023331111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132165025650000).

121023331111220 is an abundant number, since it is smaller than the sum of its proper divisors (143306720188780).

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

121023331111220 is a wasteful number, since it uses less digits than its factorization.

121023331111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459557 (or 1459555 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 121023331111220 its reverse (22111133320121), we get a palindrome (143134464431341).

The spelling of 121023331111220 in words is "one hundred twenty-one trillion, twenty-three billion, three hundred thirty-one million, one hundred eleven thousand, two hundred twenty".