22121010101 has 6 divisors (see below), whose sum is σ = 22857610806. Its totient is φ = 21407428200.

The previous prime is 22121010089. The next prime is 22121010139. The reversal of 22121010101 is 10101012122.

It can be written as a sum of positive squares in only one way, i.e., 17595757201 + 4525252900 = 132649^2 + 67270^2 .

It is not a de Polignac number, because 22121010101 - 2¹⁰ = 22121009077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121010151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11508410 + ... + 11510331.

It is an arithmetic number, because the mean of its divisors is an integer number (3809601801).

Almost surely, 2^22121010101 is an apocalyptic number.

It is an amenable number.

22121010101 is a deficient number, since it is larger than the sum of its proper divisors (736600705).

22121010101 is an equidigital number, since it uses as much as digits as its factorization.

22121010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23018803 (or 23018772 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 22121010101 its reverse (10101012122), we get a palindrome (32222022223).

The spelling of 22121010101 in words is "twenty-two billion, one hundred twenty-one million, ten thousand, one hundred one".