210222102020021 has 32 divisors (see below), whose sum is σ = 259734711844608. Its totient is φ = 165687774842880.

The previous prime is 210222102020011. The next prime is 210222102020041. The reversal of 210222102020021 is 120020201222012.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210222102020021 is a prime.

It is a super-2 number, since 2×210222102020021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210222102020011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28979861 + ... + 35500373.

It is an arithmetic number, because the mean of its divisors is an integer number (8116709745144).

Almost surely, 2^{210222102020021} is an apocalyptic number.

It is an amenable number.

210222102020021 is a deficient number, since it is larger than the sum of its proper divisors (49512609824587).

210222102020021 is a wasteful number, since it uses less digits than its factorization.

210222102020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6521901.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210222102020021 its reverse (120020201222012), we get a palindrome (330242303242033).

The spelling of 210222102020021 in words is "two hundred ten trillion, two hundred twenty-two billion, one hundred two million, twenty thousand, twenty-one".