2121003032123 has 4 divisors (see below), whose sum is σ = 2121006575640. Its totient is φ = 2120999488608.

The previous prime is 2121003032077. The next prime is 2121003032129. The reversal of 2121003032123 is 3212303001212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121003032123 - 2²⁰ = 2121001983547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121003032095 and 2121003032104.

It is not an unprimeable number, because it can be changed into a prime (2121003032129) 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, 627653 + ... + 2153126.

It is an arithmetic number, because the mean of its divisors is an integer number (530251643910).

Almost surely, 2^{2121003032123} is an apocalyptic number.

2121003032123 is a deficient number, since it is larger than the sum of its proper divisors (3543517).

2121003032123 is an equidigital number, since it uses as much as digits as its factorization.

2121003032123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3543516.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2121003032123 its reverse (3212303001212), we get a palindrome (5333306033335).

The spelling of 2121003032123 in words is "two trillion, one hundred twenty-one billion, three million, thirty-two thousand, one hundred twenty-three".