1121221211 has 6 divisors (see below), whose sum is σ = 1232416836. Its totient is φ = 1019291900.

The previous prime is 1121221183. The next prime is 1121221223.

1121221211 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1121221211 - 2⁶ = 1121221147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121221291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4633025 + ... + 4633266.

It is an arithmetic number, because the mean of its divisors is an integer number (205402806).

Almost surely, 2^1121221211 is an apocalyptic number.

1121221211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1121221211 is a deficient number, since it is larger than the sum of its proper divisors (111195625).

1121221211 is an equidigital number, since it uses as much as digits as its factorization.

1121221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9266313 (or 9266302 counting only the distinct ones).

The product of its digits is 16, while the sum is 14.

The square root of 1121221211 is about 33484.6414196121. The cubic root of 1121221211 is about 1038.8761315363.

It can be divided in two parts, 11212 and 21211, that added together give a palindrome (32423).

The spelling of 1121221211 in words is "one billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred eleven".