121001012220220 has 96 divisors (see below), whose sum is σ = 291889241280000. Its totient is φ = 41670655430400.

The previous prime is 121001012220217. The next prime is 121001012220241. The reversal of 121001012220220 is 22022210100121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121001012220194 and 121001012220203.

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, 7709610 + ... + 17362030.

It is an arithmetic number, because the mean of its divisors is an integer number (3040512930000).

Almost surely, 2^{121001012220220} is an apocalyptic number.

121001012220220 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 121001012220220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145944620640000).

121001012220220 is an abundant number, since it is smaller than the sum of its proper divisors (170888229059780).

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

121001012220220 is a wasteful number, since it uses less digits than its factorization.

121001012220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9655459 (or 9655457 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121001012220220 its reverse (22022210100121), we get a palindrome (143023222320341).

The spelling of 121001012220220 in words is "one hundred twenty-one trillion, one billion, twelve million, two hundred twenty thousand, two hundred twenty".