121554633 has 4 divisors (see below), whose sum is σ = 162072848. Its totient is φ = 81036420.

The previous prime is 121554619. The next prime is 121554637. The reversal of 121554633 is 336455121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 121554633 - 2⁴ = 121554617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121554633.

It is not an unprimeable number, because it can be changed into a prime (121554637) 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, 20259103 + ... + 20259108.

It is an arithmetic number, because the mean of its divisors is an integer number (40518212).

Almost surely, 2^121554633 is an apocalyptic number.

It is an amenable number.

121554633 is a deficient number, since it is larger than the sum of its proper divisors (40518215).

121554633 is an equidigital number, since it uses as much as digits as its factorization.

121554633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40518214.

The product of its digits is 10800, while the sum is 30.

The square root of 121554633 is about 11025.1817672091. The cubic root of 121554633 is about 495.3633125028.

The spelling of 121554633 in words is "one hundred twenty-one million, five hundred fifty-four thousand, six hundred thirty-three".