1211528536139 has 8 divisors (see below), whose sum is σ = 1220089733280. Its totient is φ = 1202974416000.

The previous prime is 1211528536121. The next prime is 1211528536147. The reversal of 1211528536139 is 9316358251121.

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 1211528536139 - 2⁸ = 1211528535883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211528536093 and 1211528536102.

It is not an unprimeable number, because it can be changed into a prime (1211528536199) by changing a digit.

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, 1425422 + ... + 2110659.

It is an arithmetic number, because the mean of its divisors is an integer number (152511216660).

Almost surely, 2^{1211528536139} is an apocalyptic number.

1211528536139 is a deficient number, since it is larger than the sum of its proper divisors (8561197141).

1211528536139 is a wasteful number, since it uses less digits than its factorization.

1211528536139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538501.

The product of its digits is 388800, while the sum is 47.

The spelling of 1211528536139 in words is "one trillion, two hundred eleven billion, five hundred twenty-eight million, five hundred thirty-six thousand, one hundred thirty-nine".