211220122021 has 8 divisors (see below), whose sum is σ = 211940605760. Its totient is φ = 210500814528.

The previous prime is 211220122019. The next prime is 211220122033. The reversal of 211220122021 is 120221022112.

It is a happy number.

211220122021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211220122021 - 2¹ = 211220122019 is a prime.

It is a super-2 number, since 2×211220122021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211220121986 and 211220122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220122121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66445 + ... + 653341.

It is an arithmetic number, because the mean of its divisors is an integer number (26492575720).

Almost surely, 2^211220122021 is an apocalyptic number.

It is an amenable number.

211220122021 is a deficient number, since it is larger than the sum of its proper divisors (720483739).

211220122021 is an equidigital number, since it uses as much as digits as its factorization.

211220122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588123.

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

Adding to 211220122021 its reverse (120221022112), we get a palindrome (331441144133).

Subtracting from 211220122021 its reverse (120221022112), we obtain a palindrome (90999099909).

The spelling of 211220122021 in words is "two hundred eleven billion, two hundred twenty million, one hundred twenty-two thousand, twenty-one".