210012002012221 has 16 divisors (see below), whose sum is σ = 221603992089984. Its totient is φ = 198628873749504.

The previous prime is 210012002012207. The next prime is 210012002012227. The reversal of 210012002012221 is 122210200210012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 210012002012221 - 2⁷ = 210012002012093 is a prime.

It is a super-2 number, since 2×210012002012221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210012002012195 and 210012002012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210012002012227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40457595 + ... + 45352408.

It is an arithmetic number, because the mean of its divisors is an integer number (13850249505624).

Almost surely, 2^{210012002012221} is an apocalyptic number.

It is an amenable number.

210012002012221 is a deficient number, since it is larger than the sum of its proper divisors (11591990077763).

210012002012221 is a wasteful number, since it uses less digits than its factorization.

210012002012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85811220.

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

Adding to 210012002012221 its reverse (122210200210012), we get a palindrome (332222202222233).

The spelling of 210012002012221 in words is "two hundred ten trillion, twelve billion, two million, twelve thousand, two hundred twenty-one".