21112022201251 has 2 divisors, whose sum is σ = 21112022201252. Its totient is φ = 21112022201250.

The previous prime is 21112022201177. The next prime is 21112022201339. The reversal of 21112022201251 is 15210222021112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21112022201251 - 2²⁹ = 21111485330339 is a prime.

It is a super-2 number, since 2×21112022201251² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21112022201651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556011100625 + 10556011100626.

It is an arithmetic number, because the mean of its divisors is an integer number (10556011100626).

Almost surely, 2^{21112022201251} is an apocalyptic number.

21112022201251 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112022201251 is an equidigital number, since it uses as much as digits as its factorization.

21112022201251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 21112022201251 its reverse (15210222021112), we get a palindrome (36322244222363).

The spelling of 21112022201251 in words is "twenty-one trillion, one hundred twelve billion, twenty-two million, two hundred one thousand, two hundred fifty-one".