121541415445 has 4 divisors (see below), whose sum is σ = 145849698540. Its totient is φ = 97233132352.

The previous prime is 121541415433. The next prime is 121541415491. The reversal of 121541415445 is 544514145121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74722409316 + 46819006129 = 273354^2 + 216377^2 .

It is a cyclic number.

It is not a de Polignac number, because 121541415445 - 2⁹ = 121541414933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12154141540 + ... + 12154141549.

It is an arithmetic number, because the mean of its divisors is an integer number (36462424635).

Almost surely, 2^121541415445 is an apocalyptic number.

It is an amenable number.

121541415445 is a deficient number, since it is larger than the sum of its proper divisors (24308283095).

121541415445 is an equidigital number, since it uses as much as digits as its factorization.

121541415445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24308283094.

The product of its digits is 64000, while the sum is 37.

The spelling of 121541415445 in words is "one hundred twenty-one billion, five hundred forty-one million, four hundred fifteen thousand, four hundred forty-five".