21222201111253 has 2 divisors, whose sum is σ = 21222201111254. Its totient is φ = 21222201111252.

The previous prime is 21222201111247. The next prime is 21222201111263. The reversal of 21222201111253 is 35211110222212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16557884063044 + 4664317048209 = 4069138^2 + 2159703^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222201111253 - 2¹⁷ = 21222200980181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222201111203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611100555626 + 10611100555627.

It is an arithmetic number, because the mean of its divisors is an integer number (10611100555627).

Almost surely, 2^{21222201111253} is an apocalyptic number.

It is an amenable number.

21222201111253 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222201111253 is an equidigital number, since it uses as much as digits as its factorization.

21222201111253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 21222201111253 its reverse (35211110222212), we get a palindrome (56433311333465).

The spelling of 21222201111253 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred one million, one hundred eleven thousand, two hundred fifty-three".