1327206121 has 16 divisors (see below), whose sum is σ = 1389286080. Its totient is φ = 1266757120.

The previous prime is 1327206119. The next prime is 1327206143. The reversal of 1327206121 is 1216027231.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1327206121 - 2¹ = 1327206119 is a prime.

It is a super-2 number, since 2×1327206121² = 3522952175239733282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1327203121) 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, 547905 + ... + 550321.

It is an arithmetic number, because the mean of its divisors is an integer number (86830380).

Almost surely, 2^1327206121 is an apocalyptic number.

It is an amenable number.

1327206121 is a deficient number, since it is larger than the sum of its proper divisors (62079959).

1327206121 is a wasteful number, since it uses less digits than its factorization.

1327206121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1327206121 is about 36430.8402455941. The cubic root of 1327206121 is about 1098.9538596676.

The spelling of 1327206121 in words is "one billion, three hundred twenty-seven million, two hundred six thousand, one hundred twenty-one".