121514021430 has 128 divisors (see below), whose sum is σ = 306013593600. Its totient is φ = 30839337984.

The previous prime is 121514021413. The next prime is 121514021441. The reversal of 121514021430 is 34120415121.

It is a self number, because there is not a number n which added to its sum of digits gives 121514021430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58900579 + ... + 58902641.

It is an arithmetic number, because the mean of its divisors is an integer number (2390731200).

Almost surely, 2^121514021430 is an apocalyptic number.

121514021430 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 121514021430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153006796800).

121514021430 is an abundant number, since it is smaller than the sum of its proper divisors (184499572170).

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

121514021430 is a wasteful number, since it uses less digits than its factorization.

121514021430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 121514021430 its reverse (34120415121), we get a palindrome (155634436551).

The spelling of 121514021430 in words is "one hundred twenty-one billion, five hundred fourteen million, twenty-one thousand, four hundred thirty".