121002322144 has 96 divisors (see below), whose sum is σ = 275776462080. Its totient is φ = 51717811200.

The previous prime is 121002322127. The next prime is 121002322151. The reversal of 121002322144 is 441223200121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351004 + ... + 604324.

It is an arithmetic number, because the mean of its divisors is an integer number (2872671480).

Almost surely, 2^121002322144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121002322144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137888231040).

121002322144 is an abundant number, since it is smaller than the sum of its proper divisors (154774139936).

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

121002322144 is a wasteful number, since it uses less digits than its factorization.

121002322144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253424 (or 253416 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 121002322144 its reverse (441223200121), we get a palindrome (562225522265).

The spelling of 121002322144 in words is "one hundred twenty-one billion, two million, three hundred twenty-two thousand, one hundred forty-four".