210220102212021 has 48 divisors (see below), whose sum is σ = 350750468472768. Its totient is φ = 119908599436800.

The previous prime is 210220102211993. The next prime is 210220102212031. The reversal of 210220102212021 is 120212201022012.

It is a happy number.

210220102212021 is a `hidden beast` number, since 2 + 10 + 220 + 10 + 221 + 202 + 1 = 666.

It is not a de Polignac number, because 210220102212021 - 2⁷ = 210220102211893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210220102211985 and 210220102212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210220102212031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65546826 + ... + 68679156.

It is an arithmetic number, because the mean of its divisors is an integer number (7307301426516).

Almost surely, 2^{210220102212021} is an apocalyptic number.

It is an amenable number.

210220102212021 is a deficient number, since it is larger than the sum of its proper divisors (140530366260747).

210220102212021 is a wasteful number, since it uses less digits than its factorization.

210220102212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172242 (or 3172239 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210220102212021 its reverse (120212201022012), we get a palindrome (330432303234033).

The spelling of 210220102212021 in words is "two hundred ten trillion, two hundred twenty billion, one hundred two million, two hundred twelve thousand, twenty-one".