121001022 has 48 divisors (see below), whose sum is σ = 274704768. Its totient is φ = 38419920.

The previous prime is 121000993. The next prime is 121001033. The reversal of 121001022 is 220100121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121000995 and 121001013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136593 + ... + 137475.

It is an arithmetic number, because the mean of its divisors is an integer number (5723016).

Almost surely, 2^121001022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121001022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137352384).

121001022 is an abundant number, since it is smaller than the sum of its proper divisors (153703746).

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

121001022 is a wasteful number, since it uses less digits than its factorization.

121001022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 121001022 is about 11000.0464544474. The cubic root of 121001022 is about 494.6101368558.

Adding to 121001022 its reverse (220100121), we get a palindrome (341101143).

Subtracting 121001022 from its reverse (220100121), we obtain a palindrome (99099099).

The spelling of 121001022 in words is "one hundred twenty-one million, one thousand, twenty-two".