121121211203 has 4 divisors (see below), whose sum is σ = 124075387128. Its totient is φ = 118167035280.

The previous prime is 121121211149. The next prime is 121121211221. The reversal of 121121211203 is 302112121121.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121121211203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121211223) 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, 1477087901 + ... + 1477087982.

It is an arithmetic number, because the mean of its divisors is an integer number (31018846782).

Almost surely, 2^121121211203 is an apocalyptic number.

121121211203 is a deficient number, since it is larger than the sum of its proper divisors (2954175925).

121121211203 is an equidigital number, since it uses as much as digits as its factorization.

121121211203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954175924.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121121211203 its reverse (302112121121), we get a palindrome (423233332324).

The spelling of 121121211203 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred eleven thousand, two hundred three".