121000153 has 2 divisors, whose sum is σ = 121000154. Its totient is φ = 121000152.

The previous prime is 121000147. The next prime is 121000157. The reversal of 121000153 is 351000121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85155984 + 35844169 = 9228^2 + 5987^2 .

It is an emirp because it is prime and its reverse (351000121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121000153 is a prime.

It is not a weakly prime, because it can be changed into another prime (121000157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500076 + 60500077.

It is an arithmetic number, because the mean of its divisors is an integer number (60500077).

Almost surely, 2^121000153 is an apocalyptic number.

It is an amenable number.

121000153 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000153 is an equidigital number, since it uses as much as digits as its factorization.

121000153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 121000153 is about 11000.0069545433. The cubic root of 121000153 is about 494.6089527962.

Adding to 121000153 its reverse (351000121), we get a palindrome (472000274).

The spelling of 121000153 in words is "one hundred twenty-one million, one hundred fifty-three", and thus it is an aban number.