121123322123220 has 144 divisors (see below), whose sum is σ = 368286721682880. Its totient is φ = 32222309856768.

The previous prime is 121123322123213. The next prime is 121123322123227. The reversal of 121123322123220 is 22321223321121.

121123322123220 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 2 + 3 + 322 + 12 + 322 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (121123322123213) and next prime (121123322123227).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123322123227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 196350507 + ... + 196966413.

Almost surely, 2^{121123322123220} is an apocalyptic number.

121123322123220 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 121123322123220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184143360841440).

121123322123220 is an abundant number, since it is smaller than the sum of its proper divisors (247163399559660).

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

121123322123220 is a wasteful number, since it uses less digits than its factorization.

121123322123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618534 (or 618529 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 121123322123220 its reverse (22321223321121), we get a palindrome (143444545444341).

The spelling of 121123322123220 in words is "one hundred twenty-one trillion, one hundred twenty-three billion, three hundred twenty-two million, one hundred twenty-three thousand, two hundred twenty".