1211051828485 has 8 divisors (see below), whose sum is σ = 1454320659960. Its totient is φ = 968135818944.

The previous prime is 1211051828477. The next prime is 1211051828543. The reversal of 1211051828485 is 5848281501121.

It is a Cunningham number, because it is equal to 1100478²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 435977601796 + 775074226689 = 660286^2 + 880383^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211051828485 - 2³ = 1211051828477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88197930 + ... + 88211659.

It is an arithmetic number, because the mean of its divisors is an integer number (181790082495).

Almost surely, 2^{1211051828485} is an apocalyptic number.

It is an amenable number.

1211051828485 is a deficient number, since it is larger than the sum of its proper divisors (243268831475).

1211051828485 is a wasteful number, since it uses less digits than its factorization.

1211051828485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176410967.

The product of its (nonzero) digits is 204800, while the sum is 46.

The spelling of 1211051828485 in words is "one trillion, two hundred eleven billion, fifty-one million, eight hundred twenty-eight thousand, four hundred eighty-five".