121083505 has 4 divisors (see below), whose sum is σ = 145300212. Its totient is φ = 96866800.

The previous prime is 121083491. The next prime is 121083511. The reversal of 121083505 is 505380121.

It is a happy number.

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 46226401 + 74857104 = 6799^2 + 8652^2 .

It is not a de Polignac number, because 121083505 - 2⁷ = 121083377 is a prime.

It is a super-2 number, since 2×121083505² = 29322430366170050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121083505.

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, 12108346 + ... + 12108355.

It is an arithmetic number, because the mean of its divisors is an integer number (36325053).

Almost surely, 2^121083505 is an apocalyptic number.

It is an amenable number.

121083505 is a deficient number, since it is larger than the sum of its proper divisors (24216707).

121083505 is an equidigital number, since it uses as much as digits as its factorization.

121083505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24216706.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 121083505 is about 11003.7950271713. The cubic root of 121083505 is about 494.7224986103.

The spelling of 121083505 in words is "one hundred twenty-one million, eighty-three thousand, five hundred five".