10403240212121 has 4 divisors (see below), whose sum is σ = 10404422004432. Its totient is φ = 10402058419812.

The previous prime is 10403240212093. The next prime is 10403240212187. The reversal of 10403240212121 is 12121204230401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10403240212121 - 2³⁴ = 10386060342937 is a prime.

It is a super-2 number, since 2×10403240212121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10403240217121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590882951 + ... + 590900556.

It is an arithmetic number, because the mean of its divisors is an integer number (2601105501108).

Almost surely, 2^{10403240212121} is an apocalyptic number.

It is an amenable number.

10403240212121 is a deficient number, since it is larger than the sum of its proper divisors (1181792311).

10403240212121 is an equidigital number, since it uses as much as digits as its factorization.

10403240212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181792310.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 10403240212121 its reverse (12121204230401), we get a palindrome (22524444442522).

The spelling of 10403240212121 in words is "ten trillion, four hundred three billion, two hundred forty million, two hundred twelve thousand, one hundred twenty-one".