1242156831411 has 16 divisors (see below), whose sum is σ = 1736408828160. Its totient is φ = 788345970720.

The previous prime is 1242156831379. The next prime is 1242156831413. The reversal of 1242156831411 is 1141386512421.

It is not a de Polignac number, because 1242156831411 - 2⁵ = 1242156831379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1242156831411.

It is not an unprimeable number, because it can be changed into a prime (1242156831413) 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 15 ways as a sum of consecutive naturals, for example, 42644856 + ... + 42673973.

It is an arithmetic number, because the mean of its divisors is an integer number (108525551760).

Almost surely, 2^{1242156831411} is an apocalyptic number.

1242156831411 is a deficient number, since it is larger than the sum of its proper divisors (494251996749).

1242156831411 is a wasteful number, since it uses less digits than its factorization.

1242156831411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85319066.

The product of its digits is 46080, while the sum is 39.

The spelling of 1242156831411 in words is "one trillion, two hundred forty-two billion, one hundred fifty-six million, eight hundred thirty-one thousand, four hundred eleven".