20102120211 has 32 divisors (see below), whose sum is σ = 28337713920. Its totient is φ = 12655843200.

The previous prime is 20102120209. The next prime is 20102120243. The reversal of 20102120211 is 11202120102.

It is not a de Polignac number, because 20102120211 - 2¹ = 20102120209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20102120201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1519656 + ... + 1532826.

It is an arithmetic number, because the mean of its divisors is an integer number (885553560).

Almost surely, 2^20102120211 is an apocalyptic number.

20102120211 is a deficient number, since it is larger than the sum of its proper divisors (8235593709).

20102120211 is a wasteful number, since it uses less digits than its factorization.

20102120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13587.

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

Adding to 20102120211 its reverse (11202120102), we get a palindrome (31304240313).

The spelling of 20102120211 in words is "twenty billion, one hundred two million, one hundred twenty thousand, two hundred eleven".