20211210110001 has 16 divisors (see below), whose sum is σ = 28533793091904. Its totient is φ = 12681401378304.

The previous prime is 20211210109969. The next prime is 20211210110101. The reversal of 20211210110001 is 10001101211202.

It is not a de Polignac number, because 20211210110001 - 2⁵ = 20211210109969 is a prime.

It is a super-2 number, since 2×20211210110001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20211210110101) 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, 2466010 + ... + 6819356.

It is an arithmetic number, because the mean of its divisors is an integer number (1783362068244).

Almost surely, 2^{20211210110001} is an apocalyptic number.

It is an amenable number.

20211210110001 is a deficient number, since it is larger than the sum of its proper divisors (8322582981903).

20211210110001 is a wasteful number, since it uses less digits than its factorization.

20211210110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444400.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20211210110001 its reverse (10001101211202), we get a palindrome (30212311321203).

The spelling of 20211210110001 in words is "twenty trillion, two hundred eleven billion, two hundred ten million, one hundred ten thousand, one".