1021100120101 has 16 divisors (see below), whose sum is σ = 1065341381760. Its totient is φ = 977485924800.

The previous prime is 1021100120093. The next prime is 1021100120113. The reversal of 1021100120101 is 1010210011201.

It is not a de Polignac number, because 1021100120101 - 2³ = 1021100120093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021100120401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2067291 + ... + 2513143.

It is an arithmetic number, because the mean of its divisors is an integer number (66583836360).

Almost surely, 2^{1021100120101} is an apocalyptic number.

It is an amenable number.

1021100120101 is a deficient number, since it is larger than the sum of its proper divisors (44241261659).

1021100120101 is a wasteful number, since it uses less digits than its factorization.

1021100120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446556.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1021100120101 its reverse (1010210011201), we get a palindrome (2031310131302).

The spelling of 1021100120101 in words is "one trillion, twenty-one billion, one hundred million, one hundred twenty thousand, one hundred one".