1321401211 has 16 divisors (see below), whose sum is σ = 1558720800. Its totient is φ = 1108412928.

The previous prime is 1321401209. The next prime is 1321401233. The reversal of 1321401211 is 1121041231.

It is a cyclic number.

It is not a de Polignac number, because 1321401211 - 2¹ = 1321401209 is a prime.

It is a super-2 number, since 2×1321401211² = 3492202320864533042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321401241) 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, 96681 + ... + 109498.

It is an arithmetic number, because the mean of its divisors is an integer number (97420050).

Almost surely, 2^1321401211 is an apocalyptic number.

1321401211 is a deficient number, since it is larger than the sum of its proper divisors (237319589).

1321401211 is a wasteful number, since it uses less digits than its factorization.

1321401211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206238.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1321401211 is about 36351.0826661325. The cubic root of 1321401211 is about 1097.3493232883.

Adding to 1321401211 its reverse (1121041231), we get a palindrome (2442442442).

The spelling of 1321401211 in words is "one billion, three hundred twenty-one million, four hundred one thousand, two hundred eleven".