10001221011010 has 8 divisors (see below), whose sum is σ = 18002197819836. Its totient is φ = 4000488404400.

The previous prime is 10001221010927. The next prime is 10001221011011. The reversal of 10001221011010 is 1011012210001.

It can be written as a sum of positive squares in 2 ways, for example, as 9154031466969 + 847189544041 = 3025563^2 + 920429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×10001221011010² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 1000122101101 = 10001221011010 / (1 + 0 + 0 + 0 + 1 + 2 + 2 + 1 + 0 + 1 + 1 + 0 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (10001221011011) 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 3 ways as a sum of consecutive naturals, for example, 500061050541 + ... + 500061050560.

Almost surely, 2^{10001221011010} is an apocalyptic number.

10001221011010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10001221011010 is a deficient number, since it is larger than the sum of its proper divisors (8000976808826).

10001221011010 is a wasteful number, since it uses less digits than its factorization.

10001221011010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000122101108.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10001221011010 its reverse (1011012210001), we get a palindrome (11012233221011).

The spelling of 10001221011010 in words is "ten trillion, one billion, two hundred twenty-one million, eleven thousand, ten".