2211012121 has 4 divisors (see below), whose sum is σ = 2327381200. Its totient is φ = 2094643044.

The previous prime is 2211012091. The next prime is 2211012143. The reversal of 2211012121 is 1212101122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2211012121 - 2¹⁹ = 2210487833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211012151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58184511 + ... + 58184548.

It is an arithmetic number, because the mean of its divisors is an integer number (581845300).

Almost surely, 2^2211012121 is an apocalyptic number.

It is an amenable number.

2211012121 is a deficient number, since it is larger than the sum of its proper divisors (116369079).

2211012121 is a wasteful number, since it uses less digits than its factorization.

2211012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116369078.

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

The square root of 2211012121 is about 47021.4006703331. The cubic root of 2211012121 is about 1302.7578771336.

Adding to 2211012121 its reverse (1212101122), we get a palindrome (3423113243).

The spelling of 2211012121 in words is "two billion, two hundred eleven million, twelve thousand, one hundred twenty-one".