4025521222381 has 2 divisors, whose sum is σ = 4025521222382. Its totient is φ = 4025521222380.

The previous prime is 4025521222379. The next prime is 4025521222403. The reversal of 4025521222381 is 1832221255204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3017485142281 + 1008036080100 = 1737091^2 + 1004010^2 .

It is a cyclic number.

It is not a de Polignac number, because 4025521222381 - 2¹ = 4025521222379 is a prime.

It is a super-2 number, since 2×4025521222381² (a number of 26 digits) contains 22 as substring.

Together with 4025521222379, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4025521222381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4025521222321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2012760611190 + 2012760611191.

It is an arithmetic number, because the mean of its divisors is an integer number (2012760611191).

Almost surely, 2^{4025521222381} is an apocalyptic number.

It is an amenable number.

4025521222381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4025521222381 is an equidigital number, since it uses as much as digits as its factorization.

4025521222381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76800, while the sum is 37.

Adding to 4025521222381 its reverse (1832221255204), we get a palindrome (5857742477585).

The spelling of 4025521222381 in words is "four trillion, twenty-five billion, five hundred twenty-one million, two hundred twenty-two thousand, three hundred eighty-one".