121390153 has 2 divisors, whose sum is σ = 121390154. Its totient is φ = 121390152.

The previous prime is 121390147. The next prime is 121390169. The reversal of 121390153 is 351093121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106667584 + 14722569 = 10328^2 + 3837^2 .

It is a cyclic number.

It is not a de Polignac number, because 121390153 - 2¹³ = 121381961 is a prime.

It is not a weakly prime, because it can be changed into another prime (121390123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60695076 + 60695077.

It is an arithmetic number, because the mean of its divisors is an integer number (60695077).

Almost surely, 2^121390153 is an apocalyptic number.

It is an amenable number.

121390153 is a deficient number, since it is larger than the sum of its proper divisors (1).

121390153 is an equidigital number, since it uses as much as digits as its factorization.

121390153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 121390153 is about 11017.7199546912. The cubic root of 121390153 is about 495.1397802708.

The spelling of 121390153 in words is "one hundred twenty-one million, three hundred ninety thousand, one hundred fifty-three".