121254202542430 has 32 divisors (see below), whose sum is σ = 222461859866400. Its totient is φ = 47568102870912.

The previous prime is 121254202542331. The next prime is 121254202542443. The reversal of 121254202542430 is 34245202452121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121254202542430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42987825 + ... + 45721564.

It is an arithmetic number, because the mean of its divisors is an integer number (6951933120825).

Almost surely, 2^{121254202542430} is an apocalyptic number.

121254202542430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121254202542430 is a deficient number, since it is larger than the sum of its proper divisors (101207657323970).

121254202542430 is a wasteful number, since it uses less digits than its factorization.

121254202542430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88712028.

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 121254202542430 its reverse (34245202452121), we get a palindrome (155499404994551).

The spelling of 121254202542430 in words is "one hundred twenty-one trillion, two hundred fifty-four billion, two hundred two million, five hundred forty-two thousand, four hundred thirty".