121243023203 has 4 divisors (see below), whose sum is σ = 121504887648. Its totient is φ = 120981158760.

The previous prime is 121243023133. The next prime is 121243023263. The reversal of 121243023203 is 302320342121.

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 121243023203 - 2⁸ = 121243022947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121243023263) 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, 130931528 + ... + 130932453.

It is an arithmetic number, because the mean of its divisors is an integer number (30376221912).

Almost surely, 2^121243023203 is an apocalyptic number.

121243023203 is a deficient number, since it is larger than the sum of its proper divisors (261864445).

121243023203 is an equidigital number, since it uses as much as digits as its factorization.

121243023203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261864444.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 121243023203 its reverse (302320342121), we get a palindrome (423563365324).

The spelling of 121243023203 in words is "one hundred twenty-one billion, two hundred forty-three million, twenty-three thousand, two hundred three".