1301121211 has 16 divisors (see below), whose sum is σ = 1417401216. Its totient is φ = 1187214336.

The previous prime is 1301121203. The next prime is 1301121229. The reversal of 1301121211 is 1121211031.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1301121211 - 2³ = 1301121203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1301121191 and 1301121200.

It is not an unprimeable number, because it can be changed into a prime (1301121251) 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, 679191 + ... + 681103.

It is an arithmetic number, because the mean of its divisors is an integer number (88587576).

Almost surely, 2^1301121211 is an apocalyptic number.

1301121211 is a deficient number, since it is larger than the sum of its proper divisors (116280005).

1301121211 is a wasteful number, since it uses less digits than its factorization.

1301121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1301121211 is about 36071.0578026206. The cubic root of 1301121211 is about 1091.7065574401.

Adding to 1301121211 its reverse (1121211031), we get a palindrome (2422332242).

The spelling of 1301121211 in words is "one billion, three hundred one million, one hundred twenty-one thousand, two hundred eleven".