420122221025 has 48 divisors (see below), whose sum is σ = 603764825328. Its totient is φ = 287207424000.

The previous prime is 420122221021. The next prime is 420122221109. The reversal of 420122221025 is 520122221024.

It can be written as a sum of positive squares in 24 ways, for example, as 407001893089 + 13120327936 = 637967^2 + 114544^2 .

It is not a de Polignac number, because 420122221025 - 2² = 420122221021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420122221021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 286256 + ... + 960305.

It is an arithmetic number, because the mean of its divisors is an integer number (12578433861).

Almost surely, 2^420122221025 is an apocalyptic number.

It is an amenable number.

420122221025 is a deficient number, since it is larger than the sum of its proper divisors (183642604303).

420122221025 is a wasteful number, since it uses less digits than its factorization.

420122221025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246662 (or 1246657 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 420122221025 its reverse (520122221024), we get a palindrome (940244442049).

Subtracting 420122221025 from its reverse (520122221024), we obtain a palindrome (99999999999).

The spelling of 420122221025 in words is "four hundred twenty billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-five".