1021200110101 has 4 divisors (see below), whose sum is σ = 1065600114912. Its totient is φ = 976800105292.

The previous prime is 1021200110089. The next prime is 1021200110107. The reversal of 1021200110101 is 1010110021201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021200110101 - 2¹⁷ = 1021199979029 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 (1021200110107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22200002371 + ... + 22200002416.

It is an arithmetic number, because the mean of its divisors is an integer number (266400028728).

Almost surely, 2^{1021200110101} is an apocalyptic number.

It is an amenable number.

1021200110101 is a deficient number, since it is larger than the sum of its proper divisors (44400004811).

1021200110101 is an equidigital number, since it uses as much as digits as its factorization.

1021200110101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44400004810.

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

Adding to 1021200110101 its reverse (1010110021201), we get a palindrome (2031310131302).

The spelling of 1021200110101 in words is "one trillion, twenty-one billion, two hundred million, one hundred ten thousand, one hundred one".