1326121011 has 16 divisors (see below), whose sum is σ = 1984079520. Its totient is φ = 875325600.

The previous prime is 1326121001. The next prime is 1326121079. The reversal of 1326121011 is 1101216231.

1326121011 is a `hidden beast` number, since 1 + 32 + 612 + 10 + 11 = 666.

It is not a de Polignac number, because 1326121011 - 2¹⁵ = 1326088243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1326121001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240420 + ... + 245873.

It is an arithmetic number, because the mean of its divisors is an integer number (124004970).

Almost surely, 2^1326121011 is an apocalyptic number.

1326121011 is a deficient number, since it is larger than the sum of its proper divisors (657958509).

1326121011 is a wasteful number, since it uses less digits than its factorization.

1326121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486403 (or 486397 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1326121011 is about 36415.9444611835. The cubic root of 1326121011 is about 1098.6542802379.

Adding to 1326121011 its reverse (1101216231), we get a palindrome (2427337242).

The spelling of 1326121011 in words is "one billion, three hundred twenty-six million, one hundred twenty-one thousand, eleven".