1251312202241 has 8 divisors (see below), whose sum is σ = 1306558667520. Its totient is φ = 1196872254928.

The previous prime is 1251312202213. The next prime is 1251312202247. The reversal of 1251312202241 is 1422022131521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251312202241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1251312202241.

It is not an unprimeable number, because it can be changed into a prime (1251312202247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201626321 + ... + 201632526.

It is an arithmetic number, because the mean of its divisors is an integer number (163319833440).

Almost surely, 2^{1251312202241} is an apocalyptic number.

It is an amenable number.

1251312202241 is a deficient number, since it is larger than the sum of its proper divisors (55246465279).

1251312202241 is a wasteful number, since it uses less digits than its factorization.

1251312202241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403258983.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 1251312202241 its reverse (1422022131521), we get a palindrome (2673334333762).

The spelling of 1251312202241 in words is "one trillion, two hundred fifty-one billion, three hundred twelve million, two hundred two thousand, two hundred forty-one".