121056563 has 6 divisors (see below), whose sum is σ = 124418196. Its totient is φ = 117783432.

The previous prime is 121056517. The next prime is 121056569. The reversal of 121056563 is 365650121.

It is not a de Polignac number, because 121056563 - 2⁸ = 121056307 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121056569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42845 + ... + 45582.

It is an arithmetic number, because the mean of its divisors is an integer number (20736366).

Almost surely, 2^121056563 is an apocalyptic number.

121056563 is a deficient number, since it is larger than the sum of its proper divisors (3361633).

121056563 is an frugal number, since it uses more digits than its factorization.

121056563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88501 (or 88464 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 121056563 is about 11002.5707450577. The cubic root of 121056563 is about 494.6858027166.

The spelling of 121056563 in words is "one hundred twenty-one million, fifty-six thousand, five hundred sixty-three".