1220211122211 has 48 divisors (see below), whose sum is σ = 1776940573824. Its totient is φ = 806855841792.

The previous prime is 1220211122173. The next prime is 1220211122227. The reversal of 1220211122211 is 1122211120221.

1220211122211 is a `hidden beast` number, since 1 + 220 + 211 + 1 + 22 + 211 = 666.

It is not a de Polignac number, because 1220211122211 - 2²¹ = 1220209025059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220211122231) 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, 1058291811 + ... + 1058292963.

It is an arithmetic number, because the mean of its divisors is an integer number (37019595288).

Almost surely, 2^{1220211122211} is an apocalyptic number.

1220211122211 is a deficient number, since it is larger than the sum of its proper divisors (556729451613).

1220211122211 is a wasteful number, since it uses less digits than its factorization.

1220211122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880 (or 2877 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1220211122211 its reverse (1122211120221), we get a palindrome (2342422242432).

The spelling of 1220211122211 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred twenty-two thousand, two hundred eleven".