210120212222221 has 8 divisors (see below), whose sum is σ = 240138552709440. Its totient is φ = 180102163563168.

The previous prime is 210120212222191. The next prime is 210120212222251. The reversal of 210120212222221 is 122222212021012.

It is an interprime number because it is at equal distance from previous prime (210120212222191) and next prime (210120212222251).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210120212222221 - 2⁵ = 210120212222189 is a prime.

It is a super-2 number, since 2×210120212222221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210120212222192 and 210120212222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120212222251) 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 7 ways as a sum of consecutive naturals, for example, 71411971 + ... + 74296096.

It is an arithmetic number, because the mean of its divisors is an integer number (30017319088680).

Almost surely, 2^{210120212222221} is an apocalyptic number.

It is an amenable number.

210120212222221 is a deficient number, since it is larger than the sum of its proper divisors (30018340487219).

210120212222221 is a wasteful number, since it uses less digits than its factorization.

210120212222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145914083.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 210120212222221 its reverse (122222212021012), we get a palindrome (332342424243233).

The spelling of 210120212222221 in words is "two hundred ten trillion, one hundred twenty billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty-one".