10101221001009 has 24 divisors (see below), whose sum is σ = 15229464731520. Its totient is φ = 6439481560512.

The previous prime is 10101221000951. The next prime is 10101221001031. The reversal of 10101221001009 is 90010012210101.

It is a happy number.

It is not a de Polignac number, because 10101221001009 - 2¹³ = 10101220992817 is a prime.

It is a super-2 number, since 2×10101221001009² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10101221000982 and 10101221001000.

It is not an unprimeable number, because it can be changed into a prime (10101221001409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6396589 + ... + 7817850.

It is an arithmetic number, because the mean of its divisors is an integer number (634561030480).

Almost surely, 2^{10101221001009} is an apocalyptic number.

It is an amenable number.

10101221001009 is a deficient number, since it is larger than the sum of its proper divisors (5128243730511).

10101221001009 is a wasteful number, since it uses less digits than its factorization.

10101221001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14217901 (or 14217898 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 10101221001009 in words is "ten trillion, one hundred one billion, two hundred twenty-one million, one thousand, nine".