210220122021 has 32 divisors (see below), whose sum is σ = 352999342080. Its totient is φ = 108306604224.

The previous prime is 210220122017. The next prime is 210220122067. The reversal of 210220122021 is 120221022012.

It is not a de Polignac number, because 210220122021 - 2² = 210220122017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210220124021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8942181 + ... + 8965658.

It is an arithmetic number, because the mean of its divisors is an integer number (11031229440).

Almost surely, 2^210220122021 is an apocalyptic number.

210220122021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210220122021 is a deficient number, since it is larger than the sum of its proper divisors (142779220059).

210220122021 is a wasteful number, since it uses less digits than its factorization.

210220122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17907905.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 210220122021 its reverse (120221022012), we get a palindrome (330441144033).

The spelling of 210220122021 in words is "two hundred ten billion, two hundred twenty million, one hundred twenty-two thousand, twenty-one".