20011210102211 has 4 divisors (see below), whose sum is σ = 20023030074432. Its totient is φ = 19999390129992.

The previous prime is 20011210102199. The next prime is 20011210102267. The reversal of 20011210102211 is 11220101211002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011210102211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011210102811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5909983571 + ... + 5909986956.

It is an arithmetic number, because the mean of its divisors is an integer number (5005757518608).

Almost surely, 2^{20011210102211} is an apocalyptic number.

20011210102211 is a deficient number, since it is larger than the sum of its proper divisors (11819972221).

20011210102211 is a wasteful number, since it uses less digits than its factorization.

20011210102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11819972220.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20011210102211 its reverse (11220101211002), we get a palindrome (31231311313213).

The spelling of 20011210102211 in words is "twenty trillion, eleven billion, two hundred ten million, one hundred two thousand, two hundred eleven".