121221023022 has 96 divisors (see below), whose sum is σ = 288394629120. Its totient is φ = 36494136000.

The previous prime is 121221022973. The next prime is 121221023047. The reversal of 121221023022 is 220320122121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121221022986 and 121221023004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38988804 + ... + 38991912.

It is an arithmetic number, because the mean of its divisors is an integer number (3004110720).

Almost surely, 2^121221023022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121221023022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144197314560).

121221023022 is an abundant number, since it is smaller than the sum of its proper divisors (167173606098).

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

121221023022 is a wasteful number, since it uses less digits than its factorization.

121221023022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4350 (or 4347 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 121221023022 its reverse (220320122121), we get a palindrome (341541145143).

Subtracting 121221023022 from its reverse (220320122121), we obtain a palindrome (99099099099).

The spelling of 121221023022 in words is "one hundred twenty-one billion, two hundred twenty-one million, twenty-three thousand, twenty-two".