211300222021 has 12 divisors (see below), whose sum is σ = 245806032780. Its totient is φ = 181108717440.

The previous prime is 211300222013. The next prime is 211300222031. The reversal of 211300222021 is 120222003112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 139804949025 + 71495272996 = 373905^2 + 267386^2 .

It is not a de Polignac number, because 211300222021 - 2³ = 211300222013 is a prime.

It is a super-2 number, since 2×211300222021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211300221986 and 211300222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211300222031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2350461 + ... + 2438701.

It is an arithmetic number, because the mean of its divisors is an integer number (20483836065).

Almost surely, 2^211300222021 is an apocalyptic number.

It is an amenable number.

211300222021 is a deficient number, since it is larger than the sum of its proper divisors (34505810759).

211300222021 is an equidigital number, since it uses as much as digits as its factorization.

211300222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137124 (or 137117 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 211300222021 its reverse (120222003112), we get a palindrome (331522225133).

The spelling of 211300222021 in words is "two hundred eleven billion, three hundred million, two hundred twenty-two thousand, twenty-one".