22121102220101 has 4 divisors (see below), whose sum is σ = 22184486467500. Its totient is φ = 22057717972704.

The previous prime is 22121102220097. The next prime is 22121102220103. The reversal of 22121102220101 is 10102220112122.

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 10249122030625 + 11871980189476 = 3201425^2 + 3445574^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121102220101 - 2² = 22121102220097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121102220101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121102220103) 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, 31692123176 + ... + 31692123873.

It is an arithmetic number, because the mean of its divisors is an integer number (5546121616875).

Almost surely, 2^{22121102220101} is an apocalyptic number.

It is an amenable number.

22121102220101 is a deficient number, since it is larger than the sum of its proper divisors (63384247399).

22121102220101 is an equidigital number, since it uses as much as digits as its factorization.

22121102220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63384247398.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22121102220101 its reverse (10102220112122), we get a palindrome (32223322332223).

The spelling of 22121102220101 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty thousand, one hundred one".