100001221000011 has 24 divisors (see below), whose sum is σ = 148353652029024. Its totient is φ = 64864129847040.

The previous prime is 100001220999983. The next prime is 100001221000013. The reversal of 100001221000011 is 110000122100001.

It is a happy number.

It is not a de Polignac number, because 100001221000011 - 2⁶ = 100001220999947 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 100001220999957 and 100001221000002.

It is not an unprimeable number, because it can be changed into a prime (100001221000013) 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, 10718026 + ... + 17744816.

It is an arithmetic number, because the mean of its divisors is an integer number (6181402167876).

Almost surely, 2^{100001221000011} is an apocalyptic number.

100001221000011 is a deficient number, since it is larger than the sum of its proper divisors (48352431029013).

100001221000011 is a wasteful number, since it uses less digits than its factorization.

100001221000011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7069571 (or 7069568 counting only the distinct ones).

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

Adding to 100001221000011 its reverse (110000122100001), we get a palindrome (210001343100012).

The spelling of 100001221000011 in words is "one hundred trillion, one billion, two hundred twenty-one million, eleven", and thus it is an aban number.