2101222121211 has 12 divisors (see below), whose sum is σ = 3036288420880. Its totient is φ = 1400265608400.

The previous prime is 2101222121111. The next prime is 2101222121291. The reversal of 2101222121211 is 1121212221012.

2101222121211 is a `hidden beast` number, since 210 + 1 + 2 + 221 + 21 + 211 = 666.

It is not a de Polignac number, because 2101222121211 - 2⁷ = 2101222121083 is a prime.

It is a super-2 number, since 2×2101222121211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101222121291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45737356 + ... + 45783273.

Almost surely, 2^{2101222121211} is an apocalyptic number.

2101222121211 is a deficient number, since it is larger than the sum of its proper divisors (935066299669).

2101222121211 is a wasteful number, since it uses less digits than its factorization.

2101222121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91523186 (or 91523183 counting only the distinct ones).

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

Adding to 2101222121211 its reverse (1121212221012), we get a palindrome (3222434342223).

The spelling of 2101222121211 in words is "two trillion, one hundred one billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred eleven".