1211122210 has 16 divisors (see below), whose sum is σ = 2180422656. Its totient is φ = 484359408.

The previous prime is 1211122207. The next prime is 1211122261. The reversal of 1211122210 is 122211121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85279 + ... + 98461.

It is an arithmetic number, because the mean of its divisors is an integer number (136276416).

Almost surely, 2^1211122210 is an apocalyptic number.

1211122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211122210 is a deficient number, since it is larger than the sum of its proper divisors (969300446).

1211122210 is a wasteful number, since it uses less digits than its factorization.

1211122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22377.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1211122210 is about 34801.1811581159. The cubic root of 1211122210 is about 1065.9315645868.

Adding to 1211122210 its reverse (122211121), we get a palindrome (1333333331).

The spelling of 1211122210 in words is "one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred ten".