1200021210101 has 16 divisors (see below), whose sum is σ = 1373739164928. Its totient is φ = 1026875404800.

The previous prime is 1200021210079. The next prime is 1200021210103. The reversal of 1200021210101 is 1010121200021.

It is not a de Polignac number, because 1200021210101 - 2²⁶ = 1199954101237 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 (1200021210103) 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, 30229496 + ... + 30269166.

It is an arithmetic number, because the mean of its divisors is an integer number (85858697808).

Almost surely, 2^{1200021210101} is an apocalyptic number.

It is an amenable number.

1200021210101 is a deficient number, since it is larger than the sum of its proper divisors (173717954827).

1200021210101 is an equidigital number, since it uses as much as digits as its factorization.

1200021210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46772.

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

Adding to 1200021210101 its reverse (1010121200021), we get a palindrome (2210142410122).

The spelling of 1200021210101 in words is "one trillion, two hundred billion, twenty-one million, two hundred ten thousand, one hundred one".