21442023402225 has 12 divisors (see below), whose sum is σ = 35450812025136. Its totient is φ = 11435745814480.

The previous prime is 21442023402047. The next prime is 21442023402227. The reversal of 21442023402225 is 52220432024412.

It is not a de Polignac number, because 21442023402225 - 2¹⁶ = 21442023336689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21442023402227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142946822607 + ... + 142946822756.

It is an arithmetic number, because the mean of its divisors is an integer number (2954234335428).

Almost surely, 2^{21442023402225} is an apocalyptic number.

21442023402225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21442023402225 is a deficient number, since it is larger than the sum of its proper divisors (14008788622911).

21442023402225 is a wasteful number, since it uses less digits than its factorization.

21442023402225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285893645376 (or 285893645371 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 33.

Adding to 21442023402225 its reverse (52220432024412), we get a palindrome (73662455426637).

The spelling of 21442023402225 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, two hundred twenty-five".