210011121202221 has 12 divisors (see below), whose sum is σ = 303358502668572. Its totient is φ = 140003211653376.

The previous prime is 210011121202199. The next prime is 210011121202241. The reversal of 210011121202221 is 122202121110012.

210011121202221 is a `hidden beast` number, since 210 + 0 + 1 + 11 + 21 + 202 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 23624324156196 + 186386797046025 = 4860486^2 + 13652355^2 .

It is not a de Polignac number, because 210011121202221 - 2²⁹ = 210010584331309 is a prime.

It is a super-2 number, since 2×210011121202221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210011121202194 and 210011121202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210011121202241) 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, 349890276 + ... + 350489981.

It is an arithmetic number, because the mean of its divisors is an integer number (25279875222381).

Almost surely, 2^{210011121202221} is an apocalyptic number.

It is an amenable number.

210011121202221 is a deficient number, since it is larger than the sum of its proper divisors (93347381466351).

210011121202221 is a wasteful number, since it uses less digits than its factorization.

210011121202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700413580 (or 700413577 counting only the distinct ones).

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

Adding to 210011121202221 its reverse (122202121110012), we get a palindrome (332213242312233).

The spelling of 210011121202221 in words is "two hundred ten trillion, eleven billion, one hundred twenty-one million, two hundred two thousand, two hundred twenty-one".