22121021101 has 2 divisors, whose sum is σ = 22121021102. Its totient is φ = 22121021100.

The previous prime is 22121021057. The next prime is 22121021107. The reversal of 22121021101 is 10112012122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20560692100 + 1560329001 = 143390^2 + 39501^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121021101 - 2⁹ = 22121020589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121021107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060510550 + 11060510551.

It is an arithmetic number, because the mean of its divisors is an integer number (11060510551).

Almost surely, 2^22121021101 is an apocalyptic number.

It is an amenable number.

22121021101 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121021101 is an equidigital number, since it uses as much as digits as its factorization.

22121021101 is an evil number, because the sum of its binary digits is even.

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

Adding to 22121021101 its reverse (10112012122), we get a palindrome (32233033223).

The spelling of 22121021101 in words is "twenty-two billion, one hundred twenty-one million, twenty-one thousand, one hundred one".