1231530135011 has 8 divisors (see below), whose sum is σ = 1343664681984. Its totient is φ = 1119425131720.

The previous prime is 1231530134999. The next prime is 1231530135061. The reversal of 1231530135011 is 1105310351321.

It is a happy number.

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 1231530135011 - 2²² = 1231525940707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231530135061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7298711 + ... + 7465536.

It is an arithmetic number, because the mean of its divisors is an integer number (167958085248).

Almost surely, 2^{1231530135011} is an apocalyptic number.

1231530135011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1231530135011 is a deficient number, since it is larger than the sum of its proper divisors (112134546973).

1231530135011 is a wasteful number, since it uses less digits than its factorization.

1231530135011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14771841.

The product of its (nonzero) digits is 1350, while the sum is 26.

Adding to 1231530135011 its reverse (1105310351321), we get a palindrome (2336840486332).

The spelling of 1231530135011 in words is "one trillion, two hundred thirty-one billion, five hundred thirty million, one hundred thirty-five thousand, eleven".