22501050101221 has 4 divisors (see below), whose sum is σ = 22504608711072. Its totient is φ = 22497491491372.

The previous prime is 22501050101147. The next prime is 22501050101249. The reversal of 22501050101221 is 12210105010522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22501050101221 - 2¹⁷ = 22501049970149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22501050101192 and 22501050101201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22501020101221) 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, 1779295441 + ... + 1779308086.

It is an arithmetic number, because the mean of its divisors is an integer number (5626152177768).

Almost surely, 2^{22501050101221} is an apocalyptic number.

It is an amenable number.

22501050101221 is a deficient number, since it is larger than the sum of its proper divisors (3558609851).

22501050101221 is an equidigital number, since it uses as much as digits as its factorization.

22501050101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3558609850.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 22501050101221 its reverse (12210105010522), we get a palindrome (34711155111743).

The spelling of 22501050101221 in words is "twenty-two trillion, five hundred one billion, fifty million, one hundred one thousand, two hundred twenty-one".