1285884320101 has 4 divisors (see below), whose sum is σ = 1320637950412. Its totient is φ = 1251130689792.

The previous prime is 1285884320069. The next prime is 1285884320131. The reversal of 1285884320101 is 1010234885821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 681572429476 + 604311890625 = 825574^2 + 777375^2 .

It is a cyclic number.

It is not a de Polignac number, because 1285884320101 - 2⁵ = 1285884320069 is a prime.

It is a super-2 number, since 2×1285884320101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285884320131) 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, 17376815100 + ... + 17376815173.

It is an arithmetic number, because the mean of its divisors is an integer number (330159487603).

Almost surely, 2^{1285884320101} is an apocalyptic number.

It is an amenable number.

1285884320101 is a deficient number, since it is larger than the sum of its proper divisors (34753630311).

1285884320101 is an equidigital number, since it uses as much as digits as its factorization.

1285884320101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34753630310.

The product of its (nonzero) digits is 122880, while the sum is 43.

The spelling of 1285884320101 in words is "one trillion, two hundred eighty-five billion, eight hundred eighty-four million, three hundred twenty thousand, one hundred one".