7821201011 has 16 divisors (see below), whose sum is σ = 8574854400. Its totient is φ = 7089531168.

The previous prime is 7821200993. The next prime is 7821201121. The reversal of 7821201011 is 1101021287.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7821201011 is a prime.

It is a super-2 number, since 2×7821201011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7821201511) 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, 776570 + ... + 786576.

It is an arithmetic number, because the mean of its divisors is an integer number (535928400).

Almost surely, 2^7821201011 is an apocalyptic number.

7821201011 is a deficient number, since it is larger than the sum of its proper divisors (753653389).

7821201011 is a wasteful number, since it uses less digits than its factorization.

7821201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11098.

The product of its (nonzero) digits is 224, while the sum is 23.

The square root of 7821201011 is about 88437.5543024568. The cubic root of 7821201011 is about 1984.9876813377.

Adding to 7821201011 its reverse (1101021287), we get a palindrome (8922222298).

The spelling of 7821201011 in words is "seven billion, eight hundred twenty-one million, two hundred one thousand, eleven".