21020000201211 has 16 divisors (see below), whose sum is σ = 30797717620608. Its totient is φ = 12646405780800.

The previous prime is 21020000201203. The next prime is 21020000201227. The reversal of 21020000201211 is 11210200002012.

It is not a de Polignac number, because 21020000201211 - 2³ = 21020000201203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21020000209211) 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, 2324702425 + ... + 2324711466.

It is an arithmetic number, because the mean of its divisors is an integer number (1924857351288).

Almost surely, 2^{21020000201211} is an apocalyptic number.

21020000201211 is a deficient number, since it is larger than the sum of its proper divisors (9777717419397).

21020000201211 is a wasteful number, since it uses less digits than its factorization.

21020000201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4649414042.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21020000201211 its reverse (11210200002012), we get a palindrome (32230200203223).

It can be divided in two parts, 210200002012 and 11, that multiplied together give a palindrome (2312200022132).

The spelling of 21020000201211 in words is "twenty-one trillion, twenty billion, two hundred one thousand, two hundred eleven".