121111202020203 has 48 divisors (see below), whose sum is σ = 193158054236160. Its totient is φ = 72782511120000.

The previous prime is 121111202020189. The next prime is 121111202020223. The reversal of 121111202020203 is 302020202111121.

It is not a de Polignac number, because 121111202020203 - 2³⁷ = 120973763066731 is a prime.

It is a super-2 number, since 2×121111202020203² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121111202020223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79860298 + ... + 81362703.

It is an arithmetic number, because the mean of its divisors is an integer number (4024126129920).

Almost surely, 2^{121111202020203} is an apocalyptic number.

121111202020203 is a deficient number, since it is larger than the sum of its proper divisors (72046852215957).

121111202020203 is a wasteful number, since it uses less digits than its factorization.

121111202020203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161223240 (or 161223237 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121111202020203 its reverse (302020202111121), we get a palindrome (423131404131324).

The spelling of 121111202020203 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred two million, twenty thousand, two hundred three".