121503919 has 2 divisors, whose sum is σ = 121503920. Its totient is φ = 121503918.

The previous prime is 121503859. The next prime is 121503929. The reversal of 121503919 is 919305121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121503919 - 2⁹ = 121503407 is a prime.

It is a super-2 number, since 2×121503919² = 29526404664717122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121503929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60751959 + 60751960.

It is an arithmetic number, because the mean of its divisors is an integer number (60751960).

Almost surely, 2^121503919 is an apocalyptic number.

121503919 is a deficient number, since it is larger than the sum of its proper divisors (1).

121503919 is an equidigital number, since it uses as much as digits as its factorization.

121503919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 121503919 is about 11022.8816105409. The cubic root of 121503919 is about 495.2944124839.

The spelling of 121503919 in words is "one hundred twenty-one million, five hundred three thousand, nine hundred nineteen".