121123203030 has 24 divisors (see below), whose sum is σ = 314920328112. Its totient is φ = 32299520784.

The previous prime is 121123203029. The next prime is 121123203031. The reversal of 121123203030 is 30302321121.

It is an interprime number because it is at equal distance from previous prime (121123203029) and next prime (121123203031).

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 = 121123202994 and 121123203012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123203031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 672906594 + ... + 672906773.

It is an arithmetic number, because the mean of its divisors is an integer number (13121680338).

Almost surely, 2^121123203030 is an apocalyptic number.

121123203030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121123203030 is an abundant number, since it is smaller than the sum of its proper divisors (193797125082).

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

121123203030 is a wasteful number, since it uses less digits than its factorization.

121123203030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345813380 (or 1345813377 counting only the distinct ones).

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

Adding to 121123203030 its reverse (30302321121), we get a palindrome (151425524151).

The spelling of 121123203030 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred three thousand, thirty".