121340504145 has 64 divisors (see below), whose sum is σ = 227958091776. Its totient is φ = 53951443200.

The previous prime is 121340504107. The next prime is 121340504177. The reversal of 121340504145 is 541405043121.

It is not a de Polignac number, because 121340504145 - 2²⁴ = 121323726929 is a prime.

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, 21469570 + ... + 21475220.

It is an arithmetic number, because the mean of its divisors is an integer number (3561845184).

Almost surely, 2^121340504145 is an apocalyptic number.

121340504145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121340504145 is a deficient number, since it is larger than the sum of its proper divisors (106617587631).

121340504145 is a wasteful number, since it uses less digits than its factorization.

121340504145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11230.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 121340504145 its reverse (541405043121), we get a palindrome (662745547266).

The spelling of 121340504145 in words is "one hundred twenty-one billion, three hundred forty million, five hundred four thousand, one hundred forty-five".