1201321211 has 4 divisors (see below), whose sum is σ = 1253552592. Its totient is φ = 1149089832.

The previous prime is 1201321181. The next prime is 1201321223. The reversal of 1201321211 is 1121231021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201321211 - 2¹⁰ = 1201320187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201321241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26115656 + ... + 26115701.

It is an arithmetic number, because the mean of its divisors is an integer number (313388148).

Almost surely, 2^1201321211 is an apocalyptic number.

1201321211 is a deficient number, since it is larger than the sum of its proper divisors (52231381).

1201321211 is an equidigital number, since it uses as much as digits as its factorization.

1201321211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52231380.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1201321211 is about 34660.0809433561. The cubic root of 1201321211 is about 1063.0484250812.

Adding to 1201321211 its reverse (1121231021), we get a palindrome (2322552232).

The spelling of 1201321211 in words is "one billion, two hundred one million, three hundred twenty-one thousand, two hundred eleven".