20102211 has 48 divisors (see below), whose sum is σ = 32651424. Its totient is φ = 11860992.

The previous prime is 20102153. The next prime is 20102213. The reversal of 20102211 is 11220102.

It is not a de Polignac number, because 20102211 - 2¹⁰ = 20101187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

20102211 is a modest number, since divided by 2211 gives 2010 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20102193 and 20102202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 300000 + ... + 300066.

It is an arithmetic number, because the mean of its divisors is an integer number (680238).

Almost surely, 2^20102211 is an apocalyptic number.

20102211 is a deficient number, since it is larger than the sum of its proper divisors (12549213).

20102211 is a wasteful number, since it uses less digits than its factorization.

20102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 20102211 is about 4483.5489291408. The cubic root of 20102211 is about 271.9033817378.

Adding to 20102211 its reverse (11220102), we get a palindrome (31322313).

The spelling of 20102211 in words is "twenty million, one hundred two thousand, two hundred eleven".