1311222210 has 32 divisors (see below), whose sum is σ = 3165789312. Its totient is φ = 347564160.

The previous prime is 1311222197. The next prime is 1311222233. The reversal of 1311222210 is 122221131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1311222210.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125851 + ... + 135870.

It is an arithmetic number, because the mean of its divisors is an integer number (98930916).

Almost surely, 2^1311222210 is an apocalyptic number.

1311222210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311222210 is an abundant number, since it is smaller than the sum of its proper divisors (1854567102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311222210 is a wasteful number, since it uses less digits than its factorization.

1311222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261898.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1311222210 is about 36210.8023937609. The cubic root of 1311222210 is about 1094.5243613033.

Adding to 1311222210 its reverse (122221131), we get a palindrome (1433443341).

The spelling of 1311222210 in words is "one billion, three hundred eleven million, two hundred twenty-two thousand, two hundred ten".