1361202242251 has 4 divisors (see below), whose sum is σ = 1361205645904. Its totient is φ = 1361198838600.

The previous prime is 1361202242207. The next prime is 1361202242269. The reversal of 1361202242251 is 1522422021631.

It is a happy number.

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 1361202242251 - 2¹⁷ = 1361202111179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361202242051) 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, 1007520 + ... + 1933261.

It is an arithmetic number, because the mean of its divisors is an integer number (340301411476).

Almost surely, 2^{1361202242251} is an apocalyptic number.

1361202242251 is a deficient number, since it is larger than the sum of its proper divisors (3403653).

1361202242251 is an equidigital number, since it uses as much as digits as its factorization.

1361202242251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403652.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 1361202242251 its reverse (1522422021631), we get a palindrome (2883624263882).

The spelling of 1361202242251 in words is "one trillion, three hundred sixty-one billion, two hundred two million, two hundred forty-two thousand, two hundred fifty-one".