121381085 has 12 divisors (see below), whose sum is σ = 169438428. Its totient is φ = 83232576.

The previous prime is 121381069. The next prime is 121381129. The reversal of 121381085 is 580183121.

It can be written as a sum of positive squares in 2 ways, for example, as 14341369 + 107039716 = 3787^2 + 10346^2 .

It is not a de Polignac number, because 121381085 - 2⁴ = 121381069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247472 + ... + 247961.

It is an arithmetic number, because the mean of its divisors is an integer number (14119869).

Almost surely, 2^121381085 is an apocalyptic number.

It is an amenable number.

121381085 is a deficient number, since it is larger than the sum of its proper divisors (48057343).

121381085 is an equidigital number, since it uses as much as digits as its factorization.

121381085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495452 (or 495445 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 121381085 is about 11017.3084281053. The cubic root of 121381085 is about 495.1274507717.

The spelling of 121381085 in words is "one hundred twenty-one million, three hundred eighty-one thousand, eighty-five".