122020171225 has 24 divisors (see below), whose sum is σ = 159294561440. Its totient is φ = 92463275520.

The previous prime is 122020171139. The next prime is 122020171241. The reversal of 122020171225 is 522171020221.

It is a happy number.

It is not a de Polignac number, because 122020171225 - 2¹⁹ = 122019646937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 122020171225.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3494302 + ... + 3529048.

Almost surely, 2^122020171225 is an apocalyptic number.

It is an amenable number.

122020171225 is a deficient number, since it is larger than the sum of its proper divisors (37274390215).

122020171225 is a wasteful number, since it uses less digits than its factorization.

122020171225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42169 (or 42164 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

Adding to 122020171225 its reverse (522171020221), we get a palindrome (644191191446).

The spelling of 122020171225 in words is "one hundred twenty-two billion, twenty million, one hundred seventy-one thousand, two hundred twenty-five".