121651363 has 4 divisors (see below), whose sum is σ = 122084568. Its totient is φ = 121218160.

The previous prime is 121651349. The next prime is 121651373. The reversal of 121651363 is 363156121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 363156121 = 5827 ⋅62323.

It is a cyclic number.

It is not a de Polignac number, because 121651363 - 2⁵ = 121651331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121651373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216181 + ... + 216742.

It is an arithmetic number, because the mean of its divisors is an integer number (30521142).

Almost surely, 2^121651363 is an apocalyptic number.

121651363 is a deficient number, since it is larger than the sum of its proper divisors (433205).

121651363 is an equidigital number, since it uses as much as digits as its factorization.

121651363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433204.

The product of its digits is 3240, while the sum is 28.

The square root of 121651363 is about 11029.5676705844. The cubic root of 121651363 is about 495.4946767227.

The spelling of 121651363 in words is "one hundred twenty-one million, six hundred fifty-one thousand, three hundred sixty-three".