121020312030 has 16 divisors (see below), whose sum is σ = 290448748944. Its totient is φ = 32272083200.

The previous prime is 121020312019. The next prime is 121020312047. The reversal of 121020312030 is 30213020121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2017005171 + ... + 2017005230.

It is an arithmetic number, because the mean of its divisors is an integer number (18153046809).

Almost surely, 2^121020312030 is an apocalyptic number.

121020312030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121020312030 is an abundant number, since it is smaller than the sum of its proper divisors (169428436914).

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

121020312030 is a wasteful number, since it uses less digits than its factorization.

121020312030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034010411.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 121020312030 its reverse (30213020121), we get a palindrome (151233332151).

The spelling of 121020312030 in words is "one hundred twenty-one billion, twenty million, three hundred twelve thousand, thirty".