251201220727243 has 2 divisors, whose sum is σ = 251201220727244. Its totient is φ = 251201220727242.

The previous prime is 251201220727217. The next prime is 251201220727267. The reversal of 251201220727243 is 342727022102152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251201220727243 - 2¹³ = 251201220719051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251201220727196 and 251201220727205.

It is not a weakly prime, because it can be changed into another prime (251201220707243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125600610363621 + 125600610363622.

It is an arithmetic number, because the mean of its divisors is an integer number (125600610363622).

Almost surely, 2^{251201220727243} is an apocalyptic number.

251201220727243 is a deficient number, since it is larger than the sum of its proper divisors (1).

251201220727243 is an equidigital number, since it uses as much as digits as its factorization.

251201220727243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188160, while the sum is 40.

Adding to 251201220727243 its reverse (342727022102152), we get a palindrome (593928242829395).

The spelling of 251201220727243 in words is "two hundred fifty-one trillion, two hundred one billion, two hundred twenty million, seven hundred twenty-seven thousand, two hundred forty-three".