1311022101 has 16 divisors (see below), whose sum is σ = 1785659904. Its totient is φ = 855397104.

The previous prime is 1311022061. The next prime is 1311022123. The reversal of 1311022101 is 1012201131.

It is not a de Polignac number, because 1311022101 - 2⁷ = 1311021973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311022501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2040 + ... + 51246.

It is an arithmetic number, because the mean of its divisors is an integer number (111603744).

Almost surely, 2^1311022101 is an apocalyptic number.

It is an amenable number.

1311022101 is a deficient number, since it is larger than the sum of its proper divisors (474637803).

1311022101 is a wasteful number, since it uses less digits than its factorization.

1311022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49400.

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

The square root of 1311022101 is about 36208.0391764039. The cubic root of 1311022101 is about 1094.4686790762.

Adding to 1311022101 its reverse (1012201131), we get a palindrome (2323223232).

The spelling of 1311022101 in words is "one billion, three hundred eleven million, twenty-two thousand, one hundred one".