121020200003 has 4 divisors (see below), whose sum is σ = 121039178040. Its totient is φ = 121001221968.

The previous prime is 121020199997. The next prime is 121020200023. The reversal of 121020200003 is 300002020121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300002020121 = 453797 ⋅661093.

It is a cyclic number.

It is not a de Polignac number, because 121020200003 - 2⁴ = 121020199987 is a prime.

It is a super-2 number, since 2×121020200003² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121020200023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9479450 + ... + 9492207.

It is an arithmetic number, because the mean of its divisors is an integer number (30259794510).

Almost surely, 2^121020200003 is an apocalyptic number.

121020200003 is a deficient number, since it is larger than the sum of its proper divisors (18978037).

121020200003 is an equidigital number, since it uses as much as digits as its factorization.

121020200003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18978036.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 121020200003 its reverse (300002020121), we get a palindrome (421022220124).

The spelling of 121020200003 in words is "one hundred twenty-one billion, twenty million, two hundred thousand, three".