121634340263 has 2 divisors, whose sum is σ = 121634340264. Its totient is φ = 121634340262.

The previous prime is 121634340259. The next prime is 121634340293. The reversal of 121634340263 is 362043436121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121634340263 - 2² = 121634340259 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121634340253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60817170131 + 60817170132.

It is an arithmetic number, because the mean of its divisors is an integer number (60817170132).

Almost surely, 2^121634340263 is an apocalyptic number.

121634340263 is a deficient number, since it is larger than the sum of its proper divisors (1).

121634340263 is an equidigital number, since it uses as much as digits as its factorization.

121634340263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 35.

Adding to 121634340263 its reverse (362043436121), we get a palindrome (483677776384).

The spelling of 121634340263 in words is "one hundred twenty-one billion, six hundred thirty-four million, three hundred forty thousand, two hundred sixty-three".