212011201121 has 4 divisors (see below), whose sum is σ = 215486794644. Its totient is φ = 208535607600.

The previous prime is 212011201079. The next prime is 212011201163. The reversal of 212011201121 is 121102110212.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (212011201079) and next prime (212011201163).

It can be written as a sum of positive squares in 2 ways, for example, as 6389764096 + 205621437025 = 79936^2 + 453455^2 .

It is a cyclic number.

It is not a de Polignac number, because 212011201121 - 2¹⁸ = 212010938977 is a prime.

It is a super-2 number, since 2×212011201121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212011201096 and 212011201105.

It is not an unprimeable number, because it can be changed into a prime (212011201421) 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, 1737796670 + ... + 1737796791.

It is an arithmetic number, because the mean of its divisors is an integer number (53871698661).

Almost surely, 2^212011201121 is an apocalyptic number.

It is an amenable number.

212011201121 is a deficient number, since it is larger than the sum of its proper divisors (3475593523).

212011201121 is an equidigital number, since it uses as much as digits as its factorization.

212011201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3475593522.

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

Adding to 212011201121 its reverse (121102110212), we get a palindrome (333113311333).

Subtracting from 212011201121 its reverse (121102110212), we obtain a palindrome (90909090909).

The spelling of 212011201121 in words is "two hundred twelve billion, eleven million, two hundred one thousand, one hundred twenty-one".