20012211 has 8 divisors (see below), whose sum is σ = 29647760. Its totient is φ = 13341456.

The previous prime is 20012207. The next prime is 20012219. The reversal of 20012211 is 11221002.

It is not a de Polignac number, because 20012211 - 2² = 20012207 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012193 and 20012202.

It is not an unprimeable number, because it can be changed into a prime (20012219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370570 + ... + 370623.

It is an arithmetic number, because the mean of its divisors is an integer number (3705970).

Almost surely, 2^20012211 is an apocalyptic number.

20012211 is a deficient number, since it is larger than the sum of its proper divisors (9635549).

20012211 is an equidigital number, since it uses as much as digits as its factorization.

20012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741202 (or 741196 counting only the distinct ones).

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

The square root of 20012211 is about 4473.5009779813. The cubic root of 20012211 is about 271.4969933430.

Adding to 20012211 its reverse (11221002), we get a palindrome (31233213).

The spelling of 20012211 in words is "twenty million, twelve thousand, two hundred eleven".