2512121003221 has 4 divisors (see below), whose sum is σ = 2573392247244. Its totient is φ = 2450849759200.

The previous prime is 2512121003207. The next prime is 2512121003243. The reversal of 2512121003221 is 1223001212152.

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

It can be written as a sum of positive squares in 2 ways, for example, as 79800035121 + 2432320968100 = 282489^2 + 1559590^2 .

It is a cyclic number.

It is not a de Polignac number, because 2512121003221 - 2⁹ = 2512121002709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2512121003192 and 2512121003201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2512121003261) 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, 30635621950 + ... + 30635622031.

It is an arithmetic number, because the mean of its divisors is an integer number (643348061811).

Almost surely, 2^{2512121003221} is an apocalyptic number.

It is an amenable number.

2512121003221 is a deficient number, since it is larger than the sum of its proper divisors (61271244023).

2512121003221 is an equidigital number, since it uses as much as digits as its factorization.

2512121003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61271244022.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 2512121003221 its reverse (1223001212152), we get a palindrome (3735122215373).

The spelling of 2512121003221 in words is "two trillion, five hundred twelve billion, one hundred twenty-one million, three thousand, two hundred twenty-one".