121020111003 has 32 divisors (see below), whose sum is σ = 186610003200. Its totient is φ = 68947343360.

The previous prime is 121020111001. The next prime is 121020111049. The reversal of 121020111003 is 300111020121.

It is not a de Polignac number, because 121020111003 - 2¹ = 121020111001 is a prime.

It is a super-3 number, since 3×121020111003³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121020111003.

It is not an unprimeable number, because it can be changed into a prime (121020111001) 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 31 ways as a sum of consecutive naturals, for example, 333523 + ... + 594371.

It is an arithmetic number, because the mean of its divisors is an integer number (5831562600).

Almost surely, 2^121020111003 is an apocalyptic number.

121020111003 is a deficient number, since it is larger than the sum of its proper divisors (65589892197).

121020111003 is a wasteful number, since it uses less digits than its factorization.

121020111003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261707.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 121020111003 its reverse (300111020121), we get a palindrome (421131131124).

The spelling of 121020111003 in words is "one hundred twenty-one billion, twenty million, one hundred eleven thousand, three".