121222355000 has 80 divisors (see below), whose sum is σ = 286953208080. Its totient is φ = 47988864000.

The previous prime is 121222354969. The next prime is 121222355011. The reversal of 121222355000 is 553222121.

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 19 ways as a sum of consecutive naturals, for example, 360029 + ... + 609971.

It is an arithmetic number, because the mean of its divisors is an integer number (3586915101).

Almost surely, 2^121222355000 is an apocalyptic number.

121222355000 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 121222355000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143476604040).

121222355000 is an abundant number, since it is smaller than the sum of its proper divisors (165730853080).

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

121222355000 is an equidigital number, since it uses as much as digits as its factorization.

121222355000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250066 (or 250047 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 121222355000 its reverse (553222121), we get a palindrome (121775577121).

The spelling of 121222355000 in words is "one hundred twenty-one billion, two hundred twenty-two million, three hundred fifty-five thousand".