1321101210 has 128 divisors (see below), whose sum is σ = 3763065600. Its totient is φ = 292608000.

The previous prime is 1321101191. The next prime is 1321101211. The reversal of 1321101210 is 121011231.

It is not an unprimeable number, because it can be changed into a prime (1321101211) 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 63 ways as a sum of consecutive naturals, for example, 431766 + ... + 434814.

It is an arithmetic number, because the mean of its divisors is an integer number (29398950).

Almost surely, 2^1321101210 is an apocalyptic number.

1321101210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321101210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1881532800).

1321101210 is an abundant number, since it is smaller than the sum of its proper divisors (2441964390).

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

1321101210 is a wasteful number, since it uses less digits than its factorization.

1321101210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3184.

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

The square root of 1321101210 is about 36346.9559935904. The cubic root of 1321101210 is about 1097.2662723552.

Adding to 1321101210 its reverse (121011231), we get a palindrome (1442112441).

The spelling of 1321101210 in words is "one billion, three hundred twenty-one million, one hundred one thousand, two hundred ten".