20100001210101 has 32 divisors (see below), whose sum is σ = 30471839523840. Its totient is φ = 13087705604400.

The previous prime is 20100001210067. The next prime is 20100001210111. The reversal of 20100001210101 is 10101210000102.

It is a happy number.

It is not a de Polignac number, because 20100001210101 - 2⁷ = 20100001209973 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 (20100001210111) 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, 22871146 + ... + 23733716.

It is an arithmetic number, because the mean of its divisors is an integer number (952244985120).

Almost surely, 2^{20100001210101} is an apocalyptic number.

It is an amenable number.

20100001210101 is a deficient number, since it is larger than the sum of its proper divisors (10371838313739).

20100001210101 is a wasteful number, since it uses less digits than its factorization.

20100001210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882694 (or 882688 counting only the distinct ones).

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

Adding to 20100001210101 its reverse (10101210000102), we get a palindrome (30201211210203).

The spelling of 20100001210101 in words is "twenty trillion, one hundred billion, one million, two hundred ten thousand, one hundred one".