121002000203 has 16 divisors (see below), whose sum is σ = 139833248256. Its totient is φ = 102559988160.

The previous prime is 121002000191. The next prime is 121002000209. The reversal of 121002000203 is 302000200121.

It is a happy number.

It is not a de Polignac number, because 121002000203 - 2¹⁰ = 121001999179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121002000209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376775 + ... + 619647.

It is an arithmetic number, because the mean of its divisors is an integer number (8739578016).

Almost surely, 2^121002000203 is an apocalyptic number.

121002000203 is a deficient number, since it is larger than the sum of its proper divisors (18831248053).

121002000203 is a wasteful number, since it uses less digits than its factorization.

121002000203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243674.

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

Adding to 121002000203 its reverse (302000200121), we get a palindrome (423002200324).

The spelling of 121002000203 in words is "one hundred twenty-one billion, two million, two hundred three", and thus it is an aban number.