121025153 has 4 divisors (see below), whose sum is σ = 123977028. Its totient is φ = 118073280.

The previous prime is 121025143. The next prime is 121025161. The reversal of 121025153 is 351520121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 351520121 = 19 ⋅18501059.

It can be written as a sum of positive squares in 2 ways, for example, as 35129329 + 85895824 = 5927^2 + 9268^2 .

It is a cyclic number.

It is not a de Polignac number, because 121025153 - 2¹² = 121021057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121025143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1475876 + ... + 1475957.

It is an arithmetic number, because the mean of its divisors is an integer number (30994257).

Almost surely, 2^121025153 is an apocalyptic number.

It is an amenable number.

121025153 is a deficient number, since it is larger than the sum of its proper divisors (2951875).

121025153 is an equidigital number, since it uses as much as digits as its factorization.

121025153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951874.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 121025153 is about 11001.1432587709. The cubic root of 121025153 is about 494.6430143849.

Adding to 121025153 its reverse (351520121), we get a palindrome (472545274).

The spelling of 121025153 in words is "one hundred twenty-one million, twenty-five thousand, one hundred fifty-three".