1021100120201 has 16 divisors (see below), whose sum is σ = 1239892485120. Its totient is φ = 823744607040.

The previous prime is 1021100120179. The next prime is 1021100120233. The reversal of 1021100120201 is 1020210011201.

It is not a de Polignac number, because 1021100120201 - 2¹⁴ = 1021100103817 is a prime.

It is a Duffinian 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, 14811065 + ... + 14879846.

It is an arithmetic number, because the mean of its divisors is an integer number (77493280320).

Almost surely, 2^{1021100120201} is an apocalyptic number.

It is an amenable number.

1021100120201 is a deficient number, since it is larger than the sum of its proper divisors (218792364919).

1021100120201 is an frugal number, since it uses more digits than its factorization.

1021100120201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29690969 (or 29690935 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021100120201 its reverse (1020210011201), we get a palindrome (2041310131402).

The spelling of 1021100120201 in words is "one trillion, twenty-one billion, one hundred million, one hundred twenty thousand, two hundred one".