21000210202011 has 16 divisors (see below), whose sum is σ = 28794246587424. Its totient is φ = 13604135975424.

The previous prime is 21000210202003. The next prime is 21000210202033. The reversal of 21000210202011 is 11020201200012.

It is not a de Polignac number, because 21000210202011 - 2³ = 21000210202003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000210202051) 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, 122288766 + ... + 122460371.

It is an arithmetic number, because the mean of its divisors is an integer number (1799640411714).

Almost surely, 2^{21000210202011} is an apocalyptic number.

21000210202011 is a deficient number, since it is larger than the sum of its proper divisors (7794036385413).

21000210202011 is a wasteful number, since it uses less digits than its factorization.

21000210202011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244749950.

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

Adding to 21000210202011 its reverse (11020201200012), we get a palindrome (32020411402023).

The spelling of 21000210202011 in words is "twenty-one trillion, two hundred ten million, two hundred two thousand, eleven".