7821212010 has 32 divisors (see below), whose sum is σ = 18997070400. Its totient is φ = 2060527488.

The previous prime is 7821211949. The next prime is 7821212011. The reversal of 7821212010 is 102121287.

It is a super-2 number, since 2×7821212010² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7821212011) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1568035 + ... + 1573014.

It is an arithmetic number, because the mean of its divisors is an integer number (593658450).

Almost surely, 2^7821212010 is an apocalyptic number.

7821212010 is an abundant number, since it is smaller than the sum of its proper divisors (11175858390).

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

7821212010 is a wasteful number, since it uses less digits than its factorization.

7821212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3141142.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 7821212010 is about 88437.6164875558. The cubic root of 7821212010 is about 1984.9886118371.

Adding to 7821212010 its reverse (102121287), we get a palindrome (7923333297).

The spelling of 7821212010 in words is "seven billion, eight hundred twenty-one million, two hundred twelve thousand, ten".