210120021002221 has 8 divisors (see below), whose sum is σ = 229247415432864. Its totient is φ = 190996888961520.

The previous prime is 210120021002161. The next prime is 210120021002231. The reversal of 210120021002221 is 122200120021012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 210120021002221 - 2⁴¹ = 207920997746669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210120021002195 and 210120021002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120021002231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1065494406 + ... + 1065691591.

It is an arithmetic number, because the mean of its divisors is an integer number (28655926929108).

Almost surely, 2^{210120021002221} is an apocalyptic number.

It is an amenable number.

210120021002221 is a deficient number, since it is larger than the sum of its proper divisors (19127394430643).

210120021002221 is a wasteful number, since it uses less digits than its factorization.

210120021002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131194971.

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

Adding to 210120021002221 its reverse (122200120021012), we get a palindrome (332320141023233).

The spelling of 210120021002221 in words is "two hundred ten trillion, one hundred twenty billion, twenty-one million, two thousand, two hundred twenty-one".