12801121069 has 24 divisors (see below), whose sum is σ = 14280832440. Its totient is φ = 11464527360.

The previous prime is 12801121061. The next prime is 12801121171. The reversal of 12801121069 is 96012110821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3037112100 + 9764008969 = 55110^2 + 98813^2 .

It is not a de Polignac number, because 12801121069 - 2³ = 12801121061 is a prime.

It is a super-2 number, since 2×12801121069² (a number of 21 digits) contains 22 as substring.

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 12801121069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12801121061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3153289 + ... + 3157345.

It is an arithmetic number, because the mean of its divisors is an integer number (595034685).

Almost surely, 2^12801121069 is an apocalyptic number.

It is an amenable number.

12801121069 is a deficient number, since it is larger than the sum of its proper divisors (1479711371).

12801121069 is a wasteful number, since it uses less digits than its factorization.

12801121069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461 (or 4450 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 31.

The spelling of 12801121069 in words is "twelve billion, eight hundred one million, one hundred twenty-one thousand, sixty-nine".