121111101120203 has 4 divisors (see below), whose sum is σ = 122182880776248. Its totient is φ = 120039321464160.

The previous prime is 121111101120197. The next prime is 121111101120239. The reversal of 121111101120203 is 302021101111121.

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 121111101120203 - 2¹⁴ = 121111101103819 is a prime.

It is a super-2 number, since 2×121111101120203² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121111101120283) 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, 535889827853 + ... + 535889828078.

It is an arithmetic number, because the mean of its divisors is an integer number (30545720194062).

Almost surely, 2^{121111101120203} is an apocalyptic number.

121111101120203 is a deficient number, since it is larger than the sum of its proper divisors (1071779656045).

121111101120203 is a wasteful number, since it uses less digits than its factorization.

121111101120203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071779656044.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 121111101120203 its reverse (302021101111121), we get a palindrome (423132202231324).

The spelling of 121111101120203 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred one million, one hundred twenty thousand, two hundred three".