210220102120021 has 8 divisors (see below), whose sum is σ = 240808973462784. Its totient is φ = 179770587822960.

The previous prime is 210220102119971. The next prime is 210220102120027. The reversal of 210220102120021 is 120021201022012.

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 210220102120021 - 2⁹ = 210220102119509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210220102119977 and 210220102120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210220102120027) 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, 34839258190 + ... + 34839264223.

It is an arithmetic number, because the mean of its divisors is an integer number (30101121682848).

Almost surely, 2^{210220102120021} is an apocalyptic number.

It is an amenable number.

210220102120021 is a deficient number, since it is larger than the sum of its proper divisors (30588871342763).

210220102120021 is an equidigital number, since it uses as much as digits as its factorization.

210220102120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69678522851.

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

Adding to 210220102120021 its reverse (120021201022012), we get a palindrome (330241303142033).

The spelling of 210220102120021 in words is "two hundred ten trillion, two hundred twenty billion, one hundred two million, one hundred twenty thousand, twenty-one".