121554653003 has 4 divisors (see below), whose sum is σ = 138919603440. Its totient is φ = 104189702568.

The previous prime is 121554652997. The next prime is 121554653029. The reversal of 121554653003 is 300356455121.

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

It is a de Polignac number, because none of the positive numbers 2^k-121554653003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121554653093) 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, 8682475208 + ... + 8682475221.

It is an arithmetic number, because the mean of its divisors is an integer number (34729900860).

Almost surely, 2^121554653003 is an apocalyptic number.

121554653003 is a deficient number, since it is larger than the sum of its proper divisors (17364950437).

121554653003 is an equidigital number, since it uses as much as digits as its factorization.

121554653003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17364950436.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 121554653003 in words is "one hundred twenty-one billion, five hundred fifty-four million, six hundred fifty-three thousand, three".