20021110112211 has 24 divisors (see below), whose sum is σ = 30052529620176. Its totient is φ = 11785001257920.

The previous prime is 20021110112189. The next prime is 20021110112261. The reversal of 20021110112211 is 11221101112002.

It is a happy number.

It is not a de Polignac number, because 20021110112211 - 2¹⁰ = 20021110111187 is a prime.

It is a super-2 number, since 2×20021110112211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20021110112261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 485198460 + ... + 485239721.

It is an arithmetic number, because the mean of its divisors is an integer number (1252188734174).

Almost surely, 2^{20021110112211} is an apocalyptic number.

20021110112211 is a deficient number, since it is larger than the sum of its proper divisors (10031419507965).

20021110112211 is a wasteful number, since it uses less digits than its factorization.

20021110112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970438243 (or 970438220 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20021110112211 its reverse (11221101112002), we get a palindrome (31242211224213).

The spelling of 20021110112211 in words is "twenty trillion, twenty-one billion, one hundred ten million, one hundred twelve thousand, two hundred eleven".