121001122220 has 96 divisors (see below), whose sum is σ = 279098265600. Its totient is φ = 43700486400.

The previous prime is 121001122201. The next prime is 121001122247. The reversal of 121001122220 is 22221100121.

It is a junction number, because it is equal to n+sod(n) for n = 121001122195 and 121001122204.

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, 22114085 + ... + 22119555.

It is an arithmetic number, because the mean of its divisors is an integer number (2907273600).

Almost surely, 2^121001122220 is an apocalyptic number.

121001122220 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 121001122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139549132800).

121001122220 is an abundant number, since it is smaller than the sum of its proper divisors (158097143380).

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

121001122220 is a wasteful number, since it uses less digits than its factorization.

121001122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6159 (or 6157 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121001122220 its reverse (22221100121), we get a palindrome (143222222341).

The spelling of 121001122220 in words is "one hundred twenty-one billion, one million, one hundred twenty-two thousand, two hundred twenty".