121505133445 has 8 divisors (see below), whose sum is σ = 145851029280. Its totient is φ = 97174194000.

The previous prime is 121505133439. The next prime is 121505133479. The reversal of 121505133445 is 544331505121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-121505133445 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121505133445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3721215 + ... + 3753724.

It is an arithmetic number, because the mean of its divisors is an integer number (18231378660).

Almost surely, 2^121505133445 is an apocalyptic number.

It is an amenable number.

121505133445 is a deficient number, since it is larger than the sum of its proper divisors (24345895835).

121505133445 is an equidigital number, since it uses as much as digits as its factorization.

121505133445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7478195.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 121505133445 its reverse (544331505121), we get a palindrome (665836638566).

The spelling of 121505133445 in words is "one hundred twenty-one billion, five hundred five million, one hundred thirty-three thousand, four hundred forty-five".