1331012011 has 4 divisors (see below), whose sum is σ = 1521156592. Its totient is φ = 1140867432.

The previous prime is 1331011973. The next prime is 1331012029. The reversal of 1331012011 is 1102101331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1102101331 = 197 ⋅5594423.

It is a cyclic number.

It is not a de Polignac number, because 1331012011 - 2¹³ = 1331003819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331011982 and 1331012000.

It is not an unprimeable number, because it can be changed into a prime (1331012071) 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 3 ways as a sum of consecutive naturals, for example, 95072280 + ... + 95072293.

It is an arithmetic number, because the mean of its divisors is an integer number (380289148).

Almost surely, 2^1331012011 is an apocalyptic number.

1331012011 is a deficient number, since it is larger than the sum of its proper divisors (190144581).

1331012011 is an equidigital number, since it uses as much as digits as its factorization.

1331012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190144580.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1331012011 is about 36483.0373050271. The cubic root of 1331012011 is about 1100.0033088055.

Adding to 1331012011 its reverse (1102101331), we get a palindrome (2433113342).

The spelling of 1331012011 in words is "one billion, three hundred thirty-one million, twelve thousand, eleven".