1003121030121 has 16 divisors (see below), whose sum is σ = 1581274531200. Its totient is φ = 553446085248.

The previous prime is 1003121030101. The next prime is 1003121030173. The reversal of 1003121030121 is 1210301213001.

It is a happy number.

It is not a de Polignac number, because 1003121030121 - 2⁹ = 1003121029609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1003121030121.

It is not an unprimeable number, because it can be changed into a prime (1003121030101) 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, 823579876 + ... + 823581093.

It is an arithmetic number, because the mean of its divisors is an integer number (98829658200).

Almost surely, 2^{1003121030121} is an apocalyptic number.

It is an amenable number.

1003121030121 is a deficient number, since it is larger than the sum of its proper divisors (578153501079).

1003121030121 is a wasteful number, since it uses less digits than its factorization.

1003121030121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647161008.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1003121030121 its reverse (1210301213001), we get a palindrome (2213422243122).

The spelling of 1003121030121 in words is "one trillion, three billion, one hundred twenty-one million, thirty thousand, one hundred twenty-one".