10101001221009 has 24 divisors (see below), whose sum is σ = 15358453656000. Its totient is φ = 6379494072480.

The previous prime is 10101001220927. The next prime is 10101001221071. The reversal of 10101001221009 is 90012210010101.

It is a happy number.

It is not a de Polignac number, because 10101001221009 - 2²¹ = 10100999123857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10101001220982 and 10101001221000.

It is not an unprimeable number, because it can be changed into a prime (10101001221109) 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, 13875892 + ... + 14585690.

It is an arithmetic number, because the mean of its divisors is an integer number (639935569000).

Almost surely, 2^{10101001221009} is an apocalyptic number.

10101001221009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

10101001221009 is a deficient number, since it is larger than the sum of its proper divisors (5257452434991).

10101001221009 is a wasteful number, since it uses less digits than its factorization.

10101001221009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793045 (or 793042 counting only the distinct ones).

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

The spelling of 10101001221009 in words is "ten trillion, one hundred one billion, one million, two hundred twenty-one thousand, nine".