245025213212121 has 16 divisors (see below), whose sum is σ = 330030603014400. Its totient is φ = 161685920643200.

The previous prime is 245025213212107. The next prime is 245025213212167. The reversal of 245025213212121 is 121212312520542.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245025213212121 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245025213212321) 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, 116186625 + ... + 118276718.

It is an arithmetic number, because the mean of its divisors is an integer number (20626912688400).

Almost surely, 2^{245025213212121} is an apocalyptic number.

It is an amenable number.

245025213212121 is a deficient number, since it is larger than the sum of its proper divisors (85005389802279).

245025213212121 is a wasteful number, since it uses less digits than its factorization.

245025213212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234466896.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 245025213212121 its reverse (121212312520542), we get a palindrome (366237525732663).

The spelling of 245025213212121 in words is "two hundred forty-five trillion, twenty-five billion, two hundred thirteen million, two hundred twelve thousand, one hundred twenty-one".