10101221000001 has 12 divisors (see below), whose sum is σ = 14984994517012. Its totient is φ = 6552143351136.

The previous prime is 10101220999949. The next prime is 10101221000021. The reversal of 10101221000001 is 10000012210101.

It is a happy number.

10101221000001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7080841170225 + 3020379829776 = 2660985^2 + 1737924^2 .

It is not a de Polignac number, because 10101221000001 - 2¹¹ = 10101220997953 is a prime.

It is a super-2 number, since 2×10101221000001² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10101221000021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15166998166 + ... + 15166998831.

Almost surely, 2^{10101221000001} is an apocalyptic number.

It is an amenable number.

10101221000001 is a deficient number, since it is larger than the sum of its proper divisors (4883773517011).

10101221000001 is a wasteful number, since it uses less digits than its factorization.

10101221000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30333997040 (or 30333997037 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10101221000001 its reverse (10000012210101), we get a palindrome (20101233210102).

The spelling of 10101221000001 in words is "ten trillion, one hundred one billion, two hundred twenty-one million, one", and thus it is an aban number.