10121221011001 has 4 divisors (see below), whose sum is σ = 10470228632100. Its totient is φ = 9772213389904.

The previous prime is 10121221010983. The next prime is 10121221011019. The reversal of 10121221011001 is 10011012212101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (10121221010983) and next prime (10121221011019).

It can be written as a sum of positive squares in 2 ways, for example, as 6838873535376 + 3282347475625 = 2615124^2 + 1811725^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121221011001 - 2⁵ = 10121221010969 is a prime.

It is a super-2 number, since 2×10121221011001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10121221011071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174503810506 + ... + 174503810563.

It is an arithmetic number, because the mean of its divisors is an integer number (2617557158025).

Almost surely, 2^{10121221011001} is an apocalyptic number.

It is an amenable number.

10121221011001 is a deficient number, since it is larger than the sum of its proper divisors (349007621099).

10121221011001 is an equidigital number, since it uses as much as digits as its factorization.

10121221011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349007621098.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10121221011001 its reverse (10011012212101), we get a palindrome (20132233223102).

The spelling of 10121221011001 in words is "ten trillion, one hundred twenty-one billion, two hundred twenty-one million, eleven thousand, one".