121345043505 has 64 divisors (see below), whose sum is σ = 230808614400. Its totient is φ = 53263042560.

The previous prime is 121345043497. The next prime is 121345043537. The reversal of 121345043505 is 505340543121.

It is not a de Polignac number, because 121345043505 - 2³ = 121345043497 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, 441061 + ... + 661229.

It is an arithmetic number, because the mean of its divisors is an integer number (3606384600).

Almost surely, 2^121345043505 is an apocalyptic number.

121345043505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121345043505 is a deficient number, since it is larger than the sum of its proper divisors (109463570895).

121345043505 is a wasteful number, since it uses less digits than its factorization.

121345043505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220394.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 121345043505 its reverse (505340543121), we get a palindrome (626685586626).

The spelling of 121345043505 in words is "one hundred twenty-one billion, three hundred forty-five million, forty-three thousand, five hundred five".