22011210121 has 2 divisors, whose sum is σ = 22011210122. Its totient is φ = 22011210120.

The previous prime is 22011210119. The next prime is 22011210131. The reversal of 22011210121 is 12101211022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21551708025 + 459502096 = 146805^2 + 21436^2 .

It is a cyclic number.

It is not a de Polignac number, because 22011210121 - 2¹ = 22011210119 is a prime.

It is a super-3 number, since 3×22011210121³ (a number of 32 digits) contains 333 as substring.

Together with 22011210119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22011210131) 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 as a sum of consecutive naturals, namely, 11005605060 + 11005605061.

It is an arithmetic number, because the mean of its divisors is an integer number (11005605061).

Almost surely, 2^22011210121 is an apocalyptic number.

It is an amenable number.

22011210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22011210121 is an equidigital number, since it uses as much as digits as its factorization.

22011210121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22011210121 its reverse (12101211022), we get a palindrome (34112421143).

Subtracting from 22011210121 its reverse (12101211022), we obtain a palindrome (9909999099).

The spelling of 22011210121 in words is "twenty-two billion, eleven million, two hundred ten thousand, one hundred twenty-one".