22121202101 has 4 divisors (see below), whose sum is σ = 22122090732. Its totient is φ = 22120313472.

The previous prime is 22121202097. The next prime is 22121202107. The reversal of 22121202101 is 10120212122.

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 2646999601 + 19474202500 = 51449^2 + 139550^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121202101 - 2² = 22121202097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121202107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405866 + ... + 457131.

It is an arithmetic number, because the mean of its divisors is an integer number (5530522683).

Almost surely, 2^22121202101 is an apocalyptic number.

It is an amenable number.

22121202101 is a deficient number, since it is larger than the sum of its proper divisors (888631).

22121202101 is an equidigital number, since it uses as much as digits as its factorization.

22121202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888630.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22121202101 its reverse (10120212122), we get a palindrome (32241414223).

The spelling of 22121202101 in words is "twenty-two billion, one hundred twenty-one million, two hundred two thousand, one hundred one".