121203123030 has 96 divisors (see below), whose sum is σ = 344230013088. Its totient is φ = 29343782400.

The previous prime is 121203123029. The next prime is 121203123049. The reversal of 121203123030 is 30321302121.

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 = 121203122994 and 121203123012.

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, 672952 + ... + 833828.

It is an arithmetic number, because the mean of its divisors is an integer number (3585729303).

Almost surely, 2^121203123030 is an apocalyptic number.

121203123030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121203123030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172115006544).

121203123030 is an abundant number, since it is smaller than the sum of its proper divisors (223026890058).

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

121203123030 is a wasteful number, since it uses less digits than its factorization.

121203123030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161662 (or 161659 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 121203123030 its reverse (30321302121), we get a palindrome (151524425151).

The spelling of 121203123030 in words is "one hundred twenty-one billion, two hundred three million, one hundred twenty-three thousand, thirty".