1220210211 has 16 divisors (see below), whose sum is σ = 1804936320. Its totient is φ = 726985920.

The previous prime is 1220210209. The next prime is 1220210227. The reversal of 1220210211 is 1120120221.

It is not a de Polignac number, because 1220210211 - 2¹ = 1220210209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220210261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311410 + ... + 315303.

It is an arithmetic number, because the mean of its divisors is an integer number (112808520).

Almost surely, 2^1220210211 is an apocalyptic number.

1220210211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220210211 is a deficient number, since it is larger than the sum of its proper divisors (584726109).

1220210211 is a wasteful number, since it uses less digits than its factorization.

1220210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626786.

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

The square root of 1220210211 is about 34931.5074252458. The cubic root of 1220210211 is about 1068.5910973083.

Adding to 1220210211 its reverse (1120120221), we get a palindrome (2340330432).

The spelling of 1220210211 in words is "one billion, two hundred twenty million, two hundred ten thousand, two hundred eleven".