1321020210 has 16 divisors (see below), whose sum is σ = 3170448576. Its totient is φ = 352272048.

The previous prime is 1321020199. The next prime is 1321020227. The reversal of 1321020210 is 120201231.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22016974 + ... + 22017033.

It is an arithmetic number, because the mean of its divisors is an integer number (198153036).

Almost surely, 2^1321020210 is an apocalyptic number.

1321020210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321020210 is an abundant number, since it is smaller than the sum of its proper divisors (1849428366).

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

1321020210 is a wasteful number, since it uses less digits than its factorization.

1321020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44034017.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1321020210 is about 36345.8417153875. The cubic root of 1321020210 is about 1097.2438465224.

Adding to 1321020210 its reverse (120201231), we get a palindrome (1441221441).

The spelling of 1321020210 in words is "one billion, three hundred twenty-one million, twenty thousand, two hundred ten".