10505121551 has 2 divisors, whose sum is σ = 10505121552. Its totient is φ = 10505121550.

The previous prime is 10505121547. The next prime is 10505121563. The reversal of 10505121551 is 15512150501.

It is a weak prime.

It is an emirp because it is prime and its reverse (15512150501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10505121551 - 2² = 10505121547 is a prime.

It is a super-2 number, since 2×10505121551² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10505121551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10505121251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252560775 + 5252560776.

It is an arithmetic number, because the mean of its divisors is an integer number (5252560776).

Almost surely, 2^10505121551 is an apocalyptic number.

10505121551 is a deficient number, since it is larger than the sum of its proper divisors (1).

10505121551 is an equidigital number, since it uses as much as digits as its factorization.

10505121551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1250, while the sum is 26.

The spelling of 10505121551 in words is "ten billion, five hundred five million, one hundred twenty-one thousand, five hundred fifty-one".