211220002200121 has 32 divisors (see below), whose sum is σ = 233928325693440. Its totient is φ = 189816438075264.

The previous prime is 211220002200019. The next prime is 211220002200131. The reversal of 211220002200121 is 121002200022112.

It is a happy number.

It is not a de Polignac number, because 211220002200121 - 2³⁵ = 211185642461753 is a prime.

It is a super-2 number, since 2×211220002200121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211220002200095 and 211220002200104.

It is not an unprimeable number, because it can be changed into a prime (211220002200131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132013906 + ... + 133604308.

It is an arithmetic number, because the mean of its divisors is an integer number (7310260177920).

Almost surely, 2^{211220002200121} is an apocalyptic number.

It is an amenable number.

211220002200121 is a deficient number, since it is larger than the sum of its proper divisors (22708323493319).

211220002200121 is a wasteful number, since it uses less digits than its factorization.

211220002200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592965.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211220002200121 its reverse (121002200022112), we get a palindrome (332222202222233).

The spelling of 211220002200121 in words is "two hundred eleven trillion, two hundred twenty billion, two million, two hundred thousand, one hundred twenty-one".