220210120021021 has 8 divisors (see below), whose sum is σ = 243558802185944. Its totient is φ = 197777072450880.

The previous prime is 220210120021007. The next prime is 220210120021057. The reversal of 220210120021021 is 120120021012022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27747493872921 + 192462626148100 = 5267589^2 + 13873090^2 .

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

It is not a de Polignac number, because 220210120021021 - 2³³ = 220201530086429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220210120020986 and 220210120021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220210120021091) 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, 228908648190 + ... + 228908649151.

It is an arithmetic number, because the mean of its divisors is an integer number (30444850273243).

Almost surely, 2^{220210120021021} is an apocalyptic number.

It is an amenable number.

220210120021021 is a deficient number, since it is larger than the sum of its proper divisors (23348682164923).

220210120021021 is a wasteful number, since it uses less digits than its factorization.

220210120021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457817297391.

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

Adding to 220210120021021 its reverse (120120021012022), we get a palindrome (340330141033043).

The spelling of 220210120021021 in words is "two hundred twenty trillion, two hundred ten billion, one hundred twenty million, twenty-one thousand, twenty-one".