20101211203021 has 16 divisors (see below), whose sum is σ = 22920990120000. Its totient is φ = 17463379891968.

The previous prime is 20101211203001. The next prime is 20101211203033. The reversal of 20101211203021 is 12030211210102.

It is not a de Polignac number, because 20101211203021 - 2¹⁹ = 20101210678733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20101211202986 and 20101211203004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101211203001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65948830 + ... + 66252928.

It is an arithmetic number, because the mean of its divisors is an integer number (1432561882500).

Almost surely, 2^{20101211203021} is an apocalyptic number.

It is an amenable number.

20101211203021 is a deficient number, since it is larger than the sum of its proper divisors (2819778916979).

20101211203021 is a wasteful number, since it uses less digits than its factorization.

20101211203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603228.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20101211203021 its reverse (12030211210102), we get a palindrome (32131422413123).

The spelling of 20101211203021 in words is "twenty trillion, one hundred one billion, two hundred eleven million, two hundred three thousand, twenty-one".