210122022120221 has 4 divisors (see below), whose sum is σ = 210126945705372. Its totient is φ = 210117098535072.

The previous prime is 210122022120217. The next prime is 210122022120277. The reversal of 210122022120221 is 122021220221012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81114700576900 + 129007321543321 = 9006370^2 + 11358139^2 .

It is a cyclic number.

It is not a de Polignac number, because 210122022120221 - 2² = 210122022120217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210122022120193 and 210122022120202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210122022125221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2461728560 + ... + 2461813913.

It is an arithmetic number, because the mean of its divisors is an integer number (52531736426343).

Almost surely, 2^{210122022120221} is an apocalyptic number.

It is an amenable number.

210122022120221 is a deficient number, since it is larger than the sum of its proper divisors (4923585151).

210122022120221 is an equidigital number, since it uses as much as digits as its factorization.

210122022120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4923585150.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 210122022120221 its reverse (122021220221012), we get a palindrome (332143242341233).

The spelling of 210122022120221 in words is "two hundred ten trillion, one hundred twenty-two billion, twenty-two million, one hundred twenty thousand, two hundred twenty-one".