2512121023243 has 16 divisors (see below), whose sum is σ = 2710019846016. Its totient is φ = 2314889216640.

The previous prime is 2512121023189. The next prime is 2512121023309. The reversal of 2512121023243 is 3423201212152.

It is a happy number.

It is not a de Polignac number, because 2512121023243 - 2²⁹ = 2511584152331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2512121023343) 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, 44973630 + ... + 45029452.

It is an arithmetic number, because the mean of its divisors is an integer number (169376240376).

Almost surely, 2^{2512121023243} is an apocalyptic number.

2512121023243 is a deficient number, since it is larger than the sum of its proper divisors (197898822773).

2512121023243 is a wasteful number, since it uses less digits than its factorization.

2512121023243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61734.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 2512121023243 its reverse (3423201212152), we get a palindrome (5935322235395).

The spelling of 2512121023243 in words is "two trillion, five hundred twelve billion, one hundred twenty-one million, twenty-three thousand, two hundred forty-three".