121542305430 has 256 divisors, whose sum is σ = 373091991552. Its totient is φ = 24649920000.

The previous prime is 121542305407. The next prime is 121542305473. The reversal of 121542305430 is 34503245121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 12774375 + ... + 12783885.

It is an arithmetic number, because the mean of its divisors is an integer number (1457390592).

Almost surely, 2^121542305430 is an apocalyptic number.

121542305430 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 121542305430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186545995776).

121542305430 is an abundant number, since it is smaller than the sum of its proper divisors (251549686122).

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

121542305430 is a wasteful number, since it uses less digits than its factorization.

121542305430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9723.

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 121542305430 in words is "one hundred twenty-one billion, five hundred forty-two million, three hundred five thousand, four hundred thirty".