10001220100101 has 32 divisors (see below), whose sum is σ = 15039471709440. Its totient is φ = 6567374923200.

The previous prime is 10001220100093. The next prime is 10001220100117. The reversal of 10001220100101 is 10100102210001.

It is a happy number.

It is not a de Polignac number, because 10001220100101 - 2³ = 10001220100093 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001220100171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 424650 + ... + 4492523.

It is an arithmetic number, because the mean of its divisors is an integer number (469983490920).

Almost surely, 2^{10001220100101} is an apocalyptic number.

It is an amenable number.

10001220100101 is a deficient number, since it is larger than the sum of its proper divisors (5038251609339).

10001220100101 is a wasteful number, since it uses less digits than its factorization.

10001220100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4918314 (or 4918308 counting only the distinct ones).

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

Adding to 10001220100101 its reverse (10100102210001), we get a palindrome (20101322310102).

The spelling of 10001220100101 in words is "ten trillion, one billion, two hundred twenty million, one hundred thousand, one hundred one".