121353563 has 4 divisors (see below), whose sum is σ = 124313448. Its totient is φ = 118393680.

The previous prime is 121353527. The next prime is 121353571. The reversal of 121353563 is 365353121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121353563 - 2¹² = 121349467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121353593) 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, 1479881 + ... + 1479962.

It is an arithmetic number, because the mean of its divisors is an integer number (31078362).

Almost surely, 2^121353563 is an apocalyptic number.

121353563 is a deficient number, since it is larger than the sum of its proper divisors (2959885).

121353563 is an equidigital number, since it uses as much as digits as its factorization.

121353563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959884.

The product of its digits is 8100, while the sum is 29.

The square root of 121353563 is about 11016.0593226435. The cubic root of 121353563 is about 495.0900261385.

The spelling of 121353563 in words is "one hundred twenty-one million, three hundred fifty-three thousand, five hundred sixty-three".